• Internal Communication System
  • External Communication System
  • Security System
  • Navigation / GMDSS
  • LAN System
  • Metrological Sysetem
  • Others
  • UHF & Wi-Fi
  • About VSWR
  • Operating test tools
  • Reason of Fiber optic cable loss
  • Fiber optic cable test
  • LAN cable test
  • Wifi Test
  • Operating test tools


SEANET Co., Ltd. has continuously developed marine communication and integrated system technology to adapt to the rapidly changing market environment. Since the establishment of SEANET in July 2008, we have been devoted to localization and development of new technology products. In addition, we are developing advanced technologies in various fields through industry-academic cooperation with Korea Maritime and Ocean University. We promise to supply the best technology to customers by leading the localization of Telecom system integration.

Company name SEANET CO., LTD
Main phone +82 51-417-5802
Company mail seanet@sea-net.co.kr
Date of establishment July 2008
Head office 542, Jeoryeong-ro, Yeongdo-gu, Busan, Korea
Total employee 55 persons (Sep. 2019)


  • 2019

    Appointed as diversification company of shipbuilding equipment business by Busan Metropolitan City


    Seanet Geoje-Korea Branch Office Established


    Seanet Seoul-Korea Branch Office Established


    Registered patent for voice activity detection method at the Korean Intellectual Property Office


    Registered patent for Internet broadcasting service system method


    Registered patent for Iridium Junction Box at the Korean Intellectual Property Office


    Leading Company of Busan Metropolitan City


    Appointed as Excellent Employment Company by Busan Economic Promotion Agency


    Appointed as Gazelles Company by Small & medium Business Corporation


    Appointed as Leading Employer Company by Busan Metropolitan City


    Appointed as Small Hidden Champion by Ministry of Employment and Labor


    Awarded $5 million Export Tower by government


    Obtained K-OHSMS 18001 Certificate by KR


    Obtained ISO14001 Certificate by KR


    Appointed as MAIN-BIZ (Management + Business) company by government


    Appointed as INNO-BIZ (Innovation + Business) company by government


    Appointed as Venture business by Kibo Technology Fund


    Appointed as Kibo A+ Members by Kibo Technology Fund


    Established Company R&D Center


    Joined Hyundai Heavy Industry as an associate company


    Joined Hyundai Mipo Shipbuilding as an associated company


    Obtained ISO9001 Certificate by KR


    Integrated ERP System was built


    Joined STX Shipbuilding as an associated company


    Joined Deawoo Shipbuilding & Marine Engineering as an associate company


    Joined Samsung Heavy Industry as an associate company


    SEANET was established


Managing (5)
  • Technical Sales
    • System Integration Team (7)
    • Shipbuilding Sales Team (5)
    • Special ship Sales Team (2)
  • Customer Service (6)
  • R&D (8)
    • Design Team
  • Production (8)
  • Seoul office (4)
  • Geoje office (4)



    • Container Carrier
    • Oil / Chemical Tanker
    • Bulk Carrier
    • Ro-Ro Passenger Ship
    • LNG Carrier
    • Cost Guard
    • Navy
    • Shuttle Tanker

    • Drill Ship
    • Rig
    • Bulk Carrier
    • Jack-up
    • FPSO
    • FLNG

    • Refinery Plant
    • Petrochemical Plant
    • Power Plant
    • Desalination Plant
    • Environment Plant

Seanet Location

Internal Communication

  • Intercom / Talkback System

    The Talk-Back system is a command communication system based on one operator unit/panel and a wide range of substations for marine environments. This systems is typically used to coordinate activities in a work group. (Main stations can hear all conversations.)

    UHF Onboard Communication System

    Repeating and amplifying for radio signal are main functions for UHF full coverage communicaiton onboard. This repeater staiton has been developed to replace the analogue type desk mounting UHF repeater station discontinued in the market even if there are still many customers for analogue type.

    Trunked Radio System

    A trunked radio system is a digital two-way radio system that uses a digital control channel to automatically assign frequency channels to groups of users.

  • Sound Powered Telephone System

    A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power.

    Public Address / General Alarm System

    The PAGA system is called the public address and the general alarm. This is a communication system that integrates emergency communication and broadcasting. The PA/GA distributes alarm tones, pre-recorded messages, emergency voice messages and routine voice messages to all or selected areas of the facility by use of loudspeakers. In areas with a high ambient noise level, flashing lights (beacons) complement voice messages and audible alarms. Alarms can be initiated either manually from any one of the dedicated access panels or automatically from the Fire and Gas Detection System or Emergency Shutdown System main panel via dedicated hardwired interfaces between the two systems. Voice messages can be generated either from the microphones at dedicated access panels or from telephones in the facility

  • Hotline Telephone System

    A Hotline Telephone System is a collection of point to point duplex voice communication facilities that each use dual telecommunication speech channels and single action calling. The Hotline Telephone System voice connectivity should be completely independent of the telephone or other voice communication systems. Hotline Telephone system will be only used in emergency situations, the system users have the ability to call and converse one-to-one with the incident management centre by a single action selection (e.g. by lifting the handset or by pressing a single push-button.

    Voice Recording System

    Voice Recording system is useful solution to record the communication equipment such as MF/HF, VHF, UHF, PABX and etc.

    Clock System

    A master clock is a precision clock that provides timing signals to synchronise slave clocks as part of a clock network. Networks of electric clocks connected by wires to a precision master pendulum clock began to be used in institutions like factories, offices, and schools around 1900. Today, many radio clocks are synchronised by radio signals or Internet connections to a worldwide time system called Coordinated Universal Time (UTC), which is governed by master atomic clocks in many countries.

  • Crane Radio System

    Specifically developed for the demanding operational environment of oil and gas rigs, the Crane radio has been developed to meet our client’s radio communications need. It can be purchased as a stand-alone product or utilized as part of a complete communication solution. The Crane Radio includes the following features, one UHF radio (for communication within the rig or vessel, offshore platform environment) and one VHF radio (for communication with shipping and vessels) combined in one unit. The unit allows the operator to change between individual radio units (VHF or UHF); via select switch.

    PABX System

    PBX stands for Private Branch Exchange, which is a private telephone network used within a company or organization. The users of the PBX phone system can communicate internally (within their company) and externally (with the outside world), using different communication channels like Voice over IP, ISDN or analog. A PBX also allows you to have more phones than physical phone lines (PTSN) and allows free calls between users. Additionally, it provides features like transfer calls, voicemail, call recording, interactive voice menus and call queues.

External Communication

  • VSAT System

    A very small aperture terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3.8 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Data rates, in most cases, range from 4 kbit/s up to 16 Mbit/s. VSATs access satellites in geosynchronous orbit or geostationary orbit to relay data from small remote Earth stations to other terminalsor master Earth station "hubs". VSAT handles data, voice and video signals.

    VHF Radio System

    VHF Radio using for maritime communication vessel to vessel or vessel to shore.

  • Aeronautical Radio Communication System

    Normally VHF-AM is used for Aeronautical Radio Communication. It is mandantory item according the CAP437 regulation.

    Microwave Radio / Wi-Max System

    WiMAX (Worldwide Interoperability for Microwave Access) is a family of wireless broadband communication standards based on the IEEE 802.16 set of standards, which provide multiple physical layer (PHY) and Media Access Control (MAC) options. WiMAX was sometimes referred to as "Wi-Fi on steroids"[5] and can be used for a number of applications including broadband connections, cellular backhaul, hotspots, etc. It is similar to Long-range Wi-Fi, but it can enable usage at much greater distances.

  • LTE Communication System

    Private LTE is a local cellular network that includes cell sites and core network servers dedicated to supporting the connectivity of a specific organization’s requirements independent of the cellular networks of service providers. It enables organizations to customize their networks for mission-critical applications, optimize the network for low latency and support specific SLA – all without interference from the often-congested public wireless spectrum.

    Inmarsat / Fleet Broadband System

    FleetBroadband is a maritime global satellite internet, telephony, SMS texting and ISDN network for ocean-going vessels using portable domed terminal antennas. These antennas, and corresponding indoor controllers, are used to connect phones and laptop computers from sailing vessels, on any ocean, with the rest of the world. All FleetBroadband antennas require line-of-sight to one of three geosynchronous orbit satellites, so the terminal can be used anywhere, including on land.

  • Satellite TV Entertainment System

    The complete range of marine satellite TV systems enables uninterrupted HD or SD TV viewing each cabin in onboard. And also crew can be watch a navigation video (e.g. ECDIS) additional using modulator. Seanet has IPTV solution. SIPTV-10 system contains a compact modular IPTV headend. Because of its flexibility and high density, our system can offer an advanced headend architectures in the ship's network for delivering real-time streaming services to their subscribers. Coming with more new modules, SIPTV-10 system is most suitable for a multiple network architectures: streaming and multiplexing of digital content over IP based networks and conversion.

Security System

  • CCTV System

    Closed-Circuit Television (CCTV), also known as video surveillance, CCTV is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans. CCTV systems may operate continuously or only as required to monitor a particular event. A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion detection and email alerts).

  • Access Control Sytsem

    Access control system provides security by giving flexible control over who is allowed to enter your premises. Access control system is one of the most common used system in electronic door control using a card or a magnetic stripe which can be accessed by swiping through a reader on the door. These access control systems are used for security purposes. The areas or organizations which require high security use different types of access control systems like bio metric, RFID, door controllers and card readers etc. Each access point may be controlled individually as per the requirement of company or organizations where high security is necessary.

  • Person Onboard System

    In an industrial oil and gas environment, it is crucial to know where workers are at all times for safety, compliance and emergency response. Personnel On Board (POB) Tracking System enables users to efficiently monitor and control the movements of personnel without the need for manual effort and facilitates faster emergency evacuation at industrial oil & gas, onshore / offshore and marine facilities. It enables personnel to be tracked in real time; allows for people to be located during emergency; and also determine access and denial-of-entry into hazardous areas such as confined spaces.

  • Surveillance / Long Range Detection System

    Using a long range camera, it is a system for monitoring something approached from far away. It works with Radar sysetm to automatically track the approaching objecets.

Navigation / GMDSS


    The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircraft.

    Radar System

    Marine radars are X band or S band radars on ships, used to detect other ships and land obstacles, to provide bearing and distance for collision avoidance and navigation at sea. They are electronic navigation instruments that use a rotating antenna to sweep a narrow beam of microwaves around the water surface surrounding the ship to the horizon, detecting targets by microwaves reflected from them, generating a picture of the ship's surroundings on a display screen. A Radar has a flat antenna that spins, emitting a signal, then listening back for that signal. The return signal bounces back at varying times based on what it may be bouncing off of.

    Sound Reception System

    Sound reception systems are acoustical-electronic navigational aids to enable the officer of the watch to hear outside sound signals inside a totally enclosed bridge in order to perform the lookout function as required in the International Regulations for Preventing Collisions at Sea, 1972. Optionally, they can also be installed on vessels without fully enclosed bridges.

  • Autopilot System

    Autopilots are self-steering devices for power or sailboats. They can hold your vessel on a pre-set compass course (even the most basic pilots do this) and sophisticated pilots that connect to GPS receivers or gather data from ship's instruments can handle a lot more advanced tasks.

    Speed Log System

    The speed logs is ship spped measuring device.
    It has two types;
    - Doppler log (measures the speed of a vessel through Doppler effects on transmitted/reflected sound waves.)
    - Electromagnetic log (sometimes called an "EM Log", measures the speed of a vessel through water.)

    Voyage Data Recorder System

    Voyage data recorder, or VDR, is a data recording system designed for all vessels required to comply with the IMO's International Convention SOLAS Requirements (IMO Res.A.861(20)) in order to collect data from various sensors on board the vessel. It then digitizes, compresses and stores this information in an externally mounted protective storage unit. The protective storage unit is a tamper-proof unit designed to withstand the extreme shock, impact, pressure and heat, which could be associated with a marine incident (fire, explosion, collision, sinking, etc.).

  • Automatic Identification System

    The automatic identification system (AIS) is an automatic tracking system that uses transponders on ships and is used by vessel traffic services (VTS). When satellites are used to detect AIS signatures, the term Satellite-AIS (S-AIS) is used. AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport. The International Maritime Organization's International Convention for the Safety of Life at Sea requires AIS to be fitted aboard international voyaging ships with 300 or more gross tonnage (GT), and all passenger ships regardless of size

    Echo Sounder System

    Echo sounding is a type of sonar used to determine the depth of water by transmitting sound waves into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Echo sounding can also refer to hydroacoustic "echo sounders" defined as active sound in water (sonar) used to study fish. Hydroacoustic assessments have traditionally employed mobile surveys from boats to evaluate fish biomass and spatial distributions. Conversely, fixed-location techniques use stationary transducers to monitor passing fish.


    An Electronic Chart Display and Information System (ECDIS) is a geographic information system used for nautical navigation that complies with International Maritime Organization (IMO) regulations as an alternative to paper nautical charts. IMO refers to similar systems not meeting the regulations as Electronic Chart Systems (ECSs). An ECDIS system displays the information from Electronic Navigational Charts (ENC) or Digital Nautical Charts (DNC) and integrates position information from position, heading and speed through water reference systems and optionally other navigational sensors. Other sensors which could interface with an ECDIS are radar, Navtex, Automatic Identification Systems (AIS), depth sounders and etc.

    Berthing Aid System

    Berthing is one of the maneuvers with the highest risk of accidents in a ship’s routine. While it is true that there are mechanisms, such as fenders, to prevent damages caused from collisions while berthing, when we speak of large-volume ships or ships with sensitive cargo, fenders may not be enough. A BAS (Berthing Aid System) is a real-time information system that provides for safe navigation and efficient transport. As its name would indicate, it helps while berthing, reducing human error. Thanks to the real-time data it provides pilots and land crew, the operation is improved.

LAN System

  • Local Area Network System

    LAN or Local Area Network connects network devices in such a way that personal computer and workstations can share data, tools and programs. The group of computers and devices are connected together by a switch, or stack of switches, using a private addressing scheme as defined by the TCP/IP protocol. Private addresses are unique in relation to other computers on the local network. Routers are found at the boundary of a LAN, connecting them to the larger WAN.

    Wide Area Network System

    WAN or Wide Area Network is a computer network that extends over a large geographical area, although it might be confined within the bounds of a state or country. A WAN could be a connection of LAN connecting to other LAN’s via telephone lines and radio waves and may be limited to an enterprise (a corporation or an organization) or accessible to the public. The technology is high speed and relatively expensive

  • Video Conference System

    Video conference means to conduct a conference between two or more participants at different sites by using computer networks to transmit audio and video data. For example, a point-to-point (two-person) video conferencing system works much like a video telephone. Each participant has a video camera, microphone, and speakers mounted on his or her computer. As the two participants speak to one another, their voices are carried over the network and delivered to the other's speakers, and whatever images appear in front of the video camera appear in a window on the other participant's monitor.

    Wifi System

    Wi-Fi allows networking of computers and digital devices without the need for wires. Data is transferred over radio frequencies, allowing Wi-Fi capable devices to receive and transmit data when they are in range of a Wi-Fi network.

  • Fiber Optic Communication System

    Fibre optic communication has revolutionised the telecommunications industry. It has also made its presence widely felt within the data networking community as well. Using fibre optic cable, optical communications have enabled telecommunications links to be made over much greater distances and with much lower levels of loss in the transmission medium and possibly most important of all, fiber optical communications has enabled much higher data rates to be accommodated.

    VoIP System

    SEANET Telecom provides a suite of Voice over IP (VoIP) solutions that allows you to transition your existing communications platform all at once or cumulatively as your business grows. Now you can operate a truly converged data and voice network while enjoying all the same benefits you rely on with your SEANET communications platform of flexibility, reliability and extendibility.

  • Telecommunication Network Monitoring System

    Monitoring all your IP devices using single software solution

    Structured Cabling System

    A Structured Cabling System is a set of cabling and connectivity products that integrates the voice, data, video, and various management systems of a building (such as security alarms, security access, energy systems, etc.). A Structured Cabling System, most simply stated, is based on following a standard methodology while planning and installing network cabling for commercial buildings. The purpose of this standard is to specify a generic telecommunications cabling system that can support a multi-product, multi-vendor environment.

Metrological Sysetem

  • Weather / Helideck Monitoring System

    The helideck monitoring system are designed to measure all weather conditions during helicopter landing and take-off operations in order to improve both flight and passenger safety. It is mandantory item according the CAP437 regulation.

    Ice Detection System

    The ICE detection provides unsurpassed imaging of sea ice conditions in the vicinity of a vessel, greatly enhancing the ability to navigate efficiently and safely 24-hours-a-day irrespective of weather conditions.

  • Weather Radar

    Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the intensity of the precipitation. Both types of data can be analyzed to determine the structure of storms and their potential to cause severe weather.

  • Oil Spill Detection System

    The ability to remotely detect and monitor oil spills at sea is becoming increasingly important due to the constant threat posesd to marine wildlife and the ecosystem. As the demand for oil based products increases, shipping routes will consequently become much busier and the likelihood of slicks occurring will also increase. If applied correctly, remote sensing can act as a beneficial monitoring tool. It can allow for early detection of slicks, provide size estimates, and help predict the movement of the slick and possibly the nature of the oil. This information will be valuable in aiding clean-up operations, and will not only help save wildlife and maintain the balance of the local ecosystem, but will also provide damage assessment and help to identify the polluters.

  • Wave Sensor

    Waves can be measured by radar, the motion of buoys or by acoustic instruments with a pressure sensor.
    - The radar is fixed-mounted above the sea and looks down to measure level (tide) and waves.
    - The buoys moves up and down on the waves and measure their own motion with inertial sensors and gyro’s.
    - The acoustic instruments are bottom mount, looking up at the surface to measure the level (tide) and waves.


  • Electronic Inclinometer

    The SEANET Electronic Inclinometer is an advanced heel and pitch measuring device which is not sensitive to horizontal and vertical accelerations. This will provide information to a better understanding of the ship's movement and steering behavior, supervision of trim, cargo status and stability status.

    Smoke Diver Communication

    Seanet Co., Ltd supplies Smoke Diver Kit for the fire fighter’s two-way portable radio communication. Smoke Diver Kit makes a perfect combination with fire fighter s breathing mask. This is the ideal communicaion solution for fire and rescure, special task operation s on the vessel or offshore platform.

  • Citadel Communication

    When the vessel is attached from piracy, crews can use citadel communication in specified safety area such as citadel. SEANET Citadel Iridium Solution typically provides satellite voice, SMS & data with competitive airtime rates compared with other satellite services. Furthermore, it is also designed to satisfied with Exxon Mobile MESQAC 2017 requirement E29 & E30 providing data of speed and location to onshore area by automatic email service.

  • Satellite Tracking & Data Reporting

    Manage your assets on the screen
    Monitor and update status on every applications. SEANET SST-100 prevent potential danger of your asset everywhere for wide rage of industries and ensure the safety and security.
    - Monitor and manage your remote asset and geofencing with administrative control via online
    - Get alarms and event notification of your asset for realtime
    - Detail reporting system and manage terminals & users as an administrator

  • Magnetic Compass System

    The SEANET magnetic compass (SMC-1000) is the most familiar compass type. It functions as a pointer to "magnetic north", the local magnetic meridian, because the magnetized needle at its heart aligns itself with the horizontal component of the Earth's magnetic field. The TMC(Transmitting Magnetic Compass)that interfaces with Fluxgate sensor, displays ‘magnetic north data’ in digital form and outputs NMEA0183 data.



  • Sound coverage calcuation will be carried out suing the sftware EASE 4.4 by AFMG Technologies GmbH

    The EASE acoustic simulation software used in this study uses the physical structure of the vessel or platform as spatical background, with walls and other structures. Loudspeakers sources are medelded as two-dimensional elemetns with raditation in different directions given by polar diagram. Structural details are input from CAD drawings. Follwed by addition of sound sources from which ans SPL map can be generated. EASE then calculates the SPL over a range of positions and prints out a map of SPL contours, allowing coverage at requried levels to be verified rapidly.

    All speaker's locations and their pointing directions are indicates as per layout drawings which accordinly were used in the simulation. In calculations, considering all doors are closed. The acoustic properties of floor material and furniture are not considered in calculation.



  • The review of the camera positions and views will be performed using GS CAD (Shipyard supply) for all vessel or platform area. The software was used to locate the relevant camera and then set up a view to the selected object, device or view. By accurate manipulation it is possible to create a view that simulates the actual view from the camera to the desired object and therefore verify that the object is in clear line of sight from the camera



  • The coverage analysis will be performed using iBwave Design + Propagation Software UHF Coverage analysis will verify the UHF radio system design and placement of the distribution antenna system in support of achieving as closed to 100% coverage as possible.

    The link budget values will be supplied for the coverage study. These values to be extracted from the manufactures product datasheets and calculations derived from them.



  • The coverage design will be performed using iBwave Design + Propagation Software. The software has built-in module for IEEE802.11n Wireless LAN.

    The specifications of Wi-Fi Access Points, termianls and On-Air parameters will be taken into account as inputs in the coverage analysis.

    WiFi link budget will be conducted to check the balance of uplink and donwlink.



DSME : H-7511 / YEAR : 2011

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • UHF Repeater Onboard Communication
  • Satellite TV & C.A.S system
  • VSAT system
  • CCTV (bosch) system
  • Talkback system
  • Master clock system
  • Auto telephone & DECT (Ericsson) system
  • PA/GA (bosch) system
  • Sound Reception system
  • Patrol System

Principle Project Summary

  • Q’ty of Cabin : 850ea
  • Capa. of Cabin : 300person
  • Capa of passenger : 3,000 person
  • sRtP (Safe Return to Port) rule applied



SHI : H-2067 / YEAR : 2012

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • UHF Repeater Onboard Communication
  • Non Directional Beacon
  • Aviation Radio system
  • Weather Monitoring system
  • Helideck Monitoring system
  • Hull Stress Monitoring system
  • VSAT system
  • Satellite TV system
  • Entertainment system (IP TV)

Principle Project Summary

  • NOPSOK (T100/T001/T003) rule applied
  • IPTV system integrated with VSAT system



SHI : H-1951 / YEAR : 2011

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • UHF Repeater Onboard Communication
  • Non Directional Beacon
  • Aviation Monitoring system
  • Hull Stress Monitoring system

Principle Project Summary

  • MODU rule applied
  • NOPSOK (T100/T001/T003)applied



SHI : H-2620 / YEAR : 2013

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • TETRA UHF communication system

Principle Project Summary

  • NOPSOK (T100/T001/T003) rule applied
  • Biggest TETRA system applied
  • Full&Detail Radio coverage study data required



SHI : H-2018/19/28/19 / YEAR : 2011

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • TETRA UHF onboard communication system
  • → Integrated Alarm Handling system
  • Satellite TV system
  • Helideck Monitoring system

Principle Project Summary

  • Total 4 series vessel
  • Advanced Trunking Radio (TETRA) with alarm Handling system applied
  • → SeaNet are first integrator vendor for TETRA system form Korean Company
  • Dual C-Band SAT. TV solution applied



SHI : H-2097/98 / YEAR : 2013

System Design, Installation, Engineering, Commissioning of the telecommunication system

  • UHF Repeater Onboard Communication
  • Weather Monitoring system
  • Helideck Monitoring system
  • VSAT
  • Non Directional Beacon
  • Aviation Radio system
  • Satellite TV system
  • Entertainment system

Principle Project Summary

  • NOPSOK (T100) rule applied



SHI : H-7108 / YEAR : 2016

Seanet scope of work

  • Drawing & Engineering (Partial Items)
  • Telecom System Commissioning (Onshare)
  • Offshare commissioning will be started at July 2017 untill Feb 2018
  • Drawing & System Modification (Full Items)/li>
  • Equipment supply (Commissioning & Operating spare parts)
  • Total 33 sub Telecom System / Onshore Commissioning

About VSWR

For a radio (transmitter or receiver) to deliver power to an antenna, the impedance of the radio and transmission line must be well matched to the antenna's impedance. The parameter VSWR is a measure that numerically describes how well the antenna is impedance matched to the radio or transmission line it is connected to.

Voltage standing wave ratio stands for voltage standing wave ratio

Displays the value of the reflected wave compared to the input wave as the ratio of standing wave

Reflective wave problem occurs when laying coaxial cable in shipyard for following reasons

1. Cable damage

During cable routing, the cable bends beyond the bending radius It can be reflected around and generate reflected wave at cable end

2. Impedance unbalance

If the communication cable uses a 50 Ohm impedance cable, 50 Ohm must be maintained from the equipment to the antenna in order to prevent impedance unbalance

However, if the connector is not working properly or the impedance is not maintained at 50 Ohm due to the surrounding environment, the reflected wave may be caused by the impedance unbalance

3. EMI (Electro Magnetic Interference)

EMI generated from high-voltage wires may distort the output and cause reflected waves

SEANET measures the VSWR and return loss by using professional manpower and equipment to report the problem occurred when installing coaxial cable.

Test tool operated

  • 1. Site Master (Anritsu, S363E)

  • 1. Site Master (Anritsu, S363E) : 2 sets

    Cable and Antenna Analyzer Highlights

    Measurements: Return Loss, VSWR, Cable Loss, Distance-To-Fault, Phase

    2-port Transmission Measurement: High/Low Power

    Sweep Speed: 1 msec/data point, typical

    Display : Single or Dual Measurement Touchscreen

    Calibration: OSL, InstaCal, and FlexCal

    Bias Tee: 32 V internal

    Spectrum and Interference Analyzer Highlights

    Measurements: Occupied Bandwidth, Channel Power, ACPR, C/I, Spectral Emission

    Interference Analyzer: Spectrogram, Signal Strength, RSSI, Signal ID

    Dynamic Range: > 95 dB in 10 Hz RBW

    DANL: -152 dBm in 10 Hz RBW

    Phase Noise: -100 dBc/Hz max @ 10 kHz offset at 1 GHz

    Frequency Accuracy: <+ 50 ppb with GPS on

  • 2. Site Master (Anritsu, S331D)

  • 2. Site Master (Anritsu, S331D) : 1 set

    Site Master Handheld Cable and Antenna Analyzer Model S331D covers 25 MHz to 4000 MHz spectrum. Suited for field technicians of any experience level working with VHF, broadcasting, paging, cellular, PCS/GSM, 3G, ISM, WLAN and WLL applications.

    Measurement capability includes precision Return Loss/SWR, Cable Loss and optional T1/E1 and power meter measurements. Frequency Domain Reflectometry (FDR) provides Distance to Fault (DTF) analysis to locate faults accurately.

  • 3. Wattmeter (Bird, Model 43)

  • 3. Wattmeter (Bird, Model 43) : 2 sets

    The 43 Wattmeter is a field-proven portable, insertion-type instrument designed to measure both forward and reflected CW power in coaxial transmission lines under any load condition. With a full-scale accuracy of ± 5%, it accurately measures RF power with low added VSWR and insertion loss. QC (quick change) type connectors and a full range of plug-in elements provide a wide choice of frequency ranges and power levels giving the Model 43 amazing flexibility. Two extra elements can be stored in the housing, one on each side.

    Accurate CW field power measurement over 450 kHz to 2.7 GHz and 100 mW to 10 kW

    Uses industry standard Bird elements with space to store 2 additional within the meter housing

    Rugged metal housing for the most demanding environments

    Quick Change (QC) connectors to minimize the need for adapters when making critical measurements

  • 4. Digital wattmeter (Comm-Connect, 3029)

  • 4. Digital wattmeter (Comm-Connect, 3029) : 1 set

    The RF One Power Meter is a very versatile instrument covering both analogue and digital carriers in an extremely wide frequency range from 30MHz to 6GHz. The RF One is capable of measuring forward and reflected power in the range of a few milliwatts up to 500 Watts.

    Frequency Range: 380 MHz to 6000 MHz

    Antenna and Cable VSWR or Return Loss

    Measure forward and reflected power

    Power Range: 200uW to 500W

    Fast RF Power Measurements

    Show Pulse and Modulation amplitude

Cause of loss of
fiber optical cable

  • 1. Coupling loss

  • 2. Cable bending

  • 3. Connector and adapter contamination

1. Coupling loss

loss generated during welding process

2. Cable bending

If worker bend the fiber too hard, the light source will deviate from the fiber. And Single mode spectrum is more sensitive to bending than multimode spectrum

Keep radius of curvature 30mm

3. Connector and adapter contamination

Fiber optic cable test

  • Test Diagram

  • Test Result

Seanet qualified engineer will execute FO cable inspection job with SM/MM OLTS & OTDR Available Activity

1. Opitical Loss Test (Fluke CertiFiber Pro OLTS)

Damage and Contamination Check for longitudinal section

Connection Check

Polarity Check

Loss Check

LAN cable test

  • 1. picture1-1

  • 2. picture1-2

  • 2. picture2

Seanet supplies LAN Cable (TIA Category 3, 4, 5, 5e, 6, 6A, 7a) test

picture 1-1,1-2 : Twisted pair cabling performance check (Search fault location)

picture 2 : Test report

Wifi Test

Seanet supplies LAN Cable (TIA Category 3, 4, 5, 5e, 6, 6A, 7a) test

picture 1-1,1-2 : Twisted pair cabling performance check (Search fault location)

picture 2 : Test report

Test tool operated

  • CableAnalyzer

  • 1. CableAnalyzer (Fluke, DSX-5000) : 1 set (2 pair)

    The DSX CableAnalyzer copper test solution enables testing and certification of twisted pair cabling for up to 10 Gigabit Ethernet deployments and will handle any cabling system whether it is a Cat 5e, 6, 6A or Class FA. Certifying a cable is one part of a process that starts with system design and ends with system acceptance. The faster that process goes, the more profitable you’ll be. Unfortunately, there are a lot of things that slow the process down - setting up the tester incorrectly, testing to the wrong limits, waiting for skilled technicians to analyze and troubleshoot failures, misinterpretation of results, and producing test reports that customers can not understand.

  • Optical loss tester

  • 2. Optical loss tester (Fluke, CFP-QUAD) : 1 set (2 pair)

    The CertiFiber Pro Optical Loss Test Set improves the efficiency of fiber optics certification. The Taptive user interface simplifies set-up, eliminates errors and speeds troubleshooting. A set reference wizard ensures correct reference setting and eliminates negative loss errors. Built on the future-ready Versiv platform, CertiFiber Pro Optical Loss Test Set (OLTS) provides merged Tier 1 (Basic) / Tier 2 (Extended) testing and reporting when paired with OptiFiber Pro module. A convenient quad module supports both singlemode and multimode and is multimode Encircled Flux compliant. Copper certification and Wi-Fi Analysis and Ethernet troubleshooting modules are also available. Analyze test results and create professional test reports using LinkWare Management Software.

  • Cable IQ Qualification tester

  • 3. Cable IQ Qualification tester (Fluke, CIQ-100) : 1 set

    The network tech's vision into cabling bandwidth CableIQ qualification tester is the first cabling bandwidth tester for network technicians. This Ethernet network cable tester gives even the most novice tech the vision to see what speeds existing cabling can support, quickly isolate cabling from network problems, and discover what is at the far end of any cable. That means network techs can close trouble tickets faster, reduce on-call time, and save money by better utilizing their existing infrastructure.

  • Lan cable tester

  • 4. Lan cable tester (Fluke, MS2-100) : 1 set

    Streamlined verification testing The MicroScannerTM Cable Verifier series simplifies the testing of voice, data, and video cable. It starts by taking results from what was four different test modes and displaying them all at once – graphical wiremap, pair lengths, distance to fault, cable ID, and far end device. What’s more, it supports virtually any type of low-voltage cable testing with no need for awkward adapters. The end result is reduced test time and technician error. That makes high-quality installations more efficient than ever.

  • Wireless tester

  • 5. Wireless tester (Netscout, Aircheck G2) : 1 set

    A rugged, handheld purpose-built wireless tester supporting the latest Wi-Fi technologies (802.11a/b/g/n/ac) including true 802.11ac 3x3 support A one-button AutoTest, which quickly provides a pass/fail indication of the wireless environment and identifies common problems An instant view of test results including network availability, connectivity, utilization, security settings, rogue hunting, and interference detection