Inmarsat Terminal
medium
16 models total
An Inmarsat terminal is a satellite communication link, and on most SOLAS vessels the Inmarsat-C channel doubles as a mandatory GMDSS distress path, which sets it apart from every other bridge instrument that only informs the crew rather than calling for help on their behalf.
Read more — Inmarsat Terminal explained ▾
What sets an Inmarsat terminal apart
Navigation instruments like the GNSS receiver or echo sounder tell the bridge about the ship's own situation. An Inmarsat terminal connects the ship to the outside world, and where fitted for Inmarsat-C, it is one of the recognized GMDSS systems for sending and receiving distress alerts, urgency and safety messages, and MSI broadcasts, entirely independent of VHF or MF/HF range limits. FleetBroadband and higher-bandwidth Inmarsat services add voice and data connectivity for operational and crew welfare traffic, but the GMDSS function is the part that carries a strict carriage requirement.
Main components
Above-deck unit
A radome-enclosed antenna, either omnidirectional for Inmarsat-C or a stabilized tracking antenna for FleetBroadband, mounted with clear sky view fore, aft and to both sides.
Below-deck unit
The transceiver and terminal processing unit, connected to the ship's power supply with battery backup, and interfaced to the GMDSS console for distress alerting.
Subscription and network
Service runs through a Land Earth Station and requires an active service subscription; a terminal with lapsed subscription is functionally equipment without a network, whatever its physical condition.
Selection and sizing
The choice between Inmarsat-C (low bandwidth, message-based, mandatory GMDSS function) and FleetBroadband or higher-tier services (broadband voice and data) depends on the vessel's communication needs beyond the regulatory minimum. Redundancy matters for the GMDSS function specifically: many vessels carry the Inmarsat-C terminal as one of two or more independent means of distress alerting required by the vessel's sea area classification.
Regulations and class requirements
SOLAS Chapter IV sets the GMDSS carriage requirements by sea area (A1 through A4), and Inmarsat-C satisfies the requirement for sea areas A1 through A3. Equipment must carry GMDSS type approval, and the interface to the EPIRB and DSC alerting systems is checked during survey. Regular testing of the distress alert function, without actually transmitting a live distress, is part of the vessel's routine drill schedule.
Typical faults
- Radome cracking and water ingress into the above-deck unit, causing corrosion of the antenna electronics that shows up as intermittent signal loss.
- Low-noise amplifier failure in the antenna assembly, degrading receive sensitivity long before it fails completely.
- Firmware or software faults in the terminal unit that require a factory reset or manufacturer intervention to clear.
- Lapsed service subscription, often discovered only when the crew tries to send a message and gets no network response.
- Below-deck unit power supply or battery backup failure, leaving the terminal without power during a mains interruption.
What to look for in a supplier
- Current GMDSS type approval matching the terminal's role in the vessel's radio installation.
- Confirmed Land Earth Station coverage for the trading area the vessel actually operates in.
- An established technical support network able to diagnose faults remotely before committing to a port call for repair.
- Spare above-deck unit components (radome, LNA) that do not require replacing the entire antenna assembly for a minor fault.
Check the subscription status before troubleshooting the hardware; a terminal in perfect working order is silent if the service behind it has lapsed.
6 manufacturers · 16 models
MacGregor
7
Terminal stacker C12C
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· Inmarsat L‑band satellite terminal
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact, stackable design reduces deck space and simplifies installation on the bridge.
- Integrated antenna eliminates separate mast or pole requirements, lowering overall weight aloft.
- Supports multiple Inmarsat services (FleetBroadband, FleetXpress) for voice, data and e‑navigation applications.
- Designed for direct interface with bridge equipment and AIS, enabling seamless integration into existing navigation suites.
- Modular hardware allows relatively quick replacement of faulty modules during scheduled maintenance.
Weaknesses
- Electronic components can age, leading to display or indicator failures if not refreshed regularly.
- Antenna cable is exposed to deck loads; corrosion has been reported when protective measures are insufficient.
- Software/firmware bugs require periodic updates from the manufacturer to maintain compliance and functionality.
- Sensitive to shipboard power fluctuations; voltage instability can cause intermittent outages.
- Sensor‑interface communication errors may arise if wiring or connectors degrade, necessitating quarterly calibration checks.
Typical Vessels:
Container shipsTankersBulk carriersOffshore support vesselsCruise ships
Decision Guide: Choose if you need a space‑saving, bridge‑mounted Inmarsat terminal with an integrated antenna and straightforward stackable installation on medium to large commercial vessels. Avoid if the vessel operates in harsh corrosive environments without robust cable protection or if maintenance intervals cannot accommodate quarterly sensor calibration and monthly backup testing.
Use Cases: The C12C is typically deployed as the primary satellite voice‑and‑data link for bridge communications, AIS data transmission, e‑navigation services (e.g., VDR streaming, weather routing), and remote monitoring of ship systems. It is favored on vessels that require a compact solution without dedicated antenna masts.
Terminal Stacker C17A
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· Inmarsat satellite communication terminal
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Automated antenna stacking reduces manual alignment time and improves pointing accuracy
- Robust marine‑grade housing designed to withstand harsh weather and deck loads
- Integrated remote monitoring and diagnostics via MacGregor’s fleet management platform
- SOLAS‑compliant GMDSS solution with built‑in redundancy for critical communications
- Modular design allows relatively straightforward replacement of faulty modules
Weaknesses
- Display units can fail over time due to electronic ageing (known issue)
- Sensor‑interface communication errors may require firmware patches
- Antenna cable corrosion observed when subjected to heavy deck loads
- Power supply sensitivity to shipboard voltage fluctuations can cause outages
- Requires quarterly sensor calibration and monthly backup‑system testing, increasing maintenance workload
Typical Vessels:
Container shipsTankersBulk carriersCruise vesselsOffshore support vessels
Certifications:
SOLAS GMDSS approvalIMO Performance Standard for Maritime Satellite Communications (PSC)DNV classification
Decision Guide: Choose if you need a rugged, automated Inmarsat terminal that minimises crew workload and meets SOLAS GMDSS requirements on vessels with sufficient deck load capacity. Avoid if the vessel has strict weight/space constraints, limited maintenance resources for regular calibrations, or if you prefer a non‑stacker antenna solution from another supplier.
Use Cases: The C17A is typically installed on large commercial ships to provide continuous global voice and broadband data connectivity for navigation safety, operational reporting, crew welfare, and compliance with GMDSS. It is especially valuable on routes where terrestrial networks are unavailable and where automated antenna handling reduces exposure of crew to harsh weather.
Terminal Stacker C18A
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· stacked Inmarsat antenna system
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact stacked design saves valuable deck space compared with traditional dish antennas
- Built‑in redundancy and automatic alignment improve reliability and reduce downtime
- Supports multiple Inmarsat services (voice, narrowband data, broadband) from a single unit
- Integrated sensor interface simplifies installation and monitoring on the bridge
- SOLAS GMDSS certified, meeting mandatory safety communications requirements
Weaknesses
- Installation can require structural reinforcement due to deck load and cable routing
- Display/electronics ageing may lead to occasional screen failures
- Antenna cabling is prone to corrosion if not protected from deck‑load stress
- Firmware/software bugs necessitate regular manufacturer advisories and updates
- Sensitive to voltage fluctuations; requires stable power supply or additional conditioning
Typical Vessels:
ContainerBulk CarrierGeneral CargoRo‑RoOffshore Support Vessel
Certifications:
DNVIMO GMDSSSOLAS
Decision Guide: Choose if you need a high‑capacity Inmarsat solution on vessels with limited deck space and can commit to regular inspections, firmware updates and power‑conditioning measures. Avoid if the ship cannot accommodate the required structural modifications or has an unstable electrical system that may jeopardise terminal performance.
Use Cases: Commonly installed on medium‑size merchant ships for GMDSS compliance, crew welfare broadband, real‑time cargo monitoring, and remote technical support where reliable satellite connectivity is essential.
Terminal Stacker C18A casted
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· Inmarsat satellite communications terminal
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Stackable design allows installation of several antennas in limited deck space
- Integrated power management reduces voltage fluctuation issues on board
- Remote diagnostics and firmware update capability via manufacturer advisory
- SOLAS‑compliant GMDSS functionality with built‑in redundancy
- Proven DNV approval for marine use
Weaknesses
- Display units can fail over time due to electronic aging
- Sensor interface communication errors reported in field service bulletins
- Firmware bugs may require frequent updates to maintain stability
- Antenna cable corrosion observed when subjected to deck load and moisture
- Sensitive to severe voltage swings in the ship’s power network
Typical Vessels:
Container shipsTankersBulk carriersCruise vesselsOffshore support vessels
Certifications:
DNV
Decision Guide: Choose if you need a compact, stackable solution for multiple Inmarsat links with built‑in redundancy and DNV approval. Avoid if the vessel has limited maintenance resources to handle frequent firmware updates or if budget constraints preclude the higher upfront cost of a stacked system.
Use Cases: Deployed on deep‑sea merchant vessels and cruise ships where continuous, high‑availability satellite communication is required for navigation safety, weather routing, crew welfare, and regulatory reporting. Often installed in bridge equipment rooms with limited space, serving as the primary GMDSS terminal.
Terminal Stacker SDL-1
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· stackable Inmarsat terminal
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact stackable design saves deck space compared with separate antenna‑modem installations
- DNV‑approved and SOLAS compliant, simplifying certification procedures
- Integrated monitoring allows remote firmware updates and health checks
- Robust housing suited for harsh marine environments
- Standardised mounting reduces installation time
Weaknesses
- Higher power draw than some low‑profile alternatives; requires stable shipboard voltage
- Antenna cable is exposed to deck loads and may corrode if not inspected regularly
- Software/firmware updates are required periodically to fix bugs
- Initial cost higher than basic single‑antenna terminals
- Complexity of the stacker can make troubleshooting more time‑consuming
Typical Vessels:
Container shipTankerBulk carrierCruise linerOffshore supply vessel
Certifications:
DNVIMO GMDSSSOLAS
Decision Guide: Choose if: you need a space‑efficient, DNV‑approved Inmarsat solution with integrated monitoring and can commit to regular software updates. Avoid if: the vessel operates in extremely corrosive environments without a robust maintenance regime, or budget constraints favour a simpler single‑antenna terminal.
Use Cases: The SDL-1 is typically installed on large commercial vessels for primary voice and data communications, AIS integration, e‑Navigation services and remote fleet monitoring. Its stackable antenna arrangement is especially useful where deck space is at a premium or multiple satellite services are required.
Terminal Stacker SDL-4
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· Motorised stacked Inmarsat satellite antenna
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact stackable design saves valuable deck space
- Automated raise/lower mechanism reduces crew workload and improves safety
- Integrated NMEA/RS422 interfaces simplify connection to bridge and monitoring systems
- IMO SOLAS type‑approved and DNV classified for marine use
- Supports both Inmarsat FleetBroadband and Classic services for voice, data and internet
Weaknesses
- Mechanical moving parts are subject to wear, corrosion of antenna cables and require regular inspection
- Software/firmware updates are mandatory to resolve known bugs
- Sensitive to shipboard power fluctuations; voltage instability can cause outages
- Higher initial cost compared with fixed‑dish satellite terminals
- Installation requires structural reinforcement for the motorised mast
Typical Vessels:
Container shipBulk carrierTankerCruise linerOffshore support vessel
Certifications:
IMO SOLAS Type ApprovalDNV Classification Society approval
Decision Guide: Choose if you need high‑speed satellite broadband on vessels with limited deck space and want automated antenna handling to minimise crew intervention. Avoid if the ship cannot accommodate moving equipment, has severe vibration environments, or budget constraints make a fixed‑dish solution more attractive.
Use Cases: The SDL-4 is typically installed on merchant vessels for crew welfare internet access, real‑time operational data exchange, remote monitoring of engine and cargo systems, and compliance reporting. Its automated antenna makes it suitable for ships that spend long periods at sea where manual antenna alignment would be impractical.
Terminal Stacker SDL-5
Per IMO/SOLAS navigation requirements
· Navigation Data / Sensor
· Inmarsat L‑band VSAT terminal
Common Failures & Inspection Points
- Anzeige-/Display-Ausfall durch Elektronik-Alterung
- Sensor-Interface Kommunikationsfehler
- Software-/Firmware-Bugs erfordern Updates
- Antennenkabel-Korrosion durch Deckbelastung
- Spannungsversorgungsprobleme bei Bordnetz-Schwankungen
Service: Jährliche Inspektion per SOLAS/Flag State. Software-Updates per Hersteller-Advisory. Sensor-Kalibrierung quartalsweise. Backup-System Test monatlich.
Spare Parts: MacGregor Finland Oy: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact, low‑profile design saves deck space and simplifies installation
- Integrated antenna stacker offers auto‑tracking with minimal manual alignment
- Marine‑grade construction meets SOLAS/GMDSS requirements and DNV approval
- Remote monitoring and firmware update capability via manufacturer advisory
- Quick backup‑system test procedures support high availability
Weaknesses
- Limited peak bandwidth compared with larger, dedicated VSAT antennas
- Antenna movement mechanisms can be prone to wear in harsh deck environments
- Performance degrades at very high latitudes where Inmarsat coverage is reduced
- Higher upfront cost per unit versus basic handheld satellite phones
- Requires clear sky view; obstructed decks or superstructures may limit placement
Typical Vessels:
Container shipBulk carrierTankerRo‑Ro vesselOffshore support vessel
Certifications:
DNVIMO GMDSS (SOLAS) compliance
Decision Guide: Choose if: you need a reliable, SOLAS‑compliant broadband link on vessels with limited deck space and prefer an all‑in‑one unit with remote update capability. Avoid if: the vessel operates primarily in high‑latitude regions where Inmarsat coverage is marginal or if budget constraints favor lower‑cost, low‑bandwidth solutions.
Use Cases: The SDL‑5 is typically installed on medium to large commercial vessels that require continuous GMDSS voice and data services, crew welfare internet access, and real‑time operational monitoring. It is common on new builds and retrofits where deck space is at a premium and the ship’s communications architecture favours an integrated terminal.
Sailor (Cobham)
4
6110 mini-C
Inmarsat-C
· Navigation Data / Sensor
· Inmarsat-C satellite terminal
Service
Inmarsat-C
Gmdss approved
ja
Data rate
600 bps
Common Failures & Inspection Points
- Antenna pointing issues
- Message queue overflow
- Power supply failure
Service: SOLAS-mandatory Inmarsat-C. Annual GMDSS test mandatory. Check antenna clear sky view.
Spare Parts: Sailor (Cobham): Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Small footprint and lightweight installation – ideal for vessels with limited space
- Low power consumption (≈30 W) suitable for ships with modest electrical capacity
- Full GMDSS compliance, including automatic distress alerting (MAYDAY/URGENT)
- Simple user interface and quick set‑up; integrates easily with existing bridge consoles
- Proven reliability on a wide range of commercial vessels
Weaknesses
- Limited data rate of 600 bps restricts bandwidth‑intensive applications
- External antenna must maintain an unobstructed sky view; pointing issues are common in heavy seas
- Message queue can overflow during high traffic periods, leading to delayed transmissions
- No support for newer broadband services (e.g., FleetBroadband or Iridium Certus)
- Power‑supply failures have been reported on older installations
Typical Vessels:
Coastal cargo vesselsTugboatsOffshore supply shipsFishing vesselsPassenger ferriesYachts over 24 m
Certifications:
IMO GMDSS Type ApprovalUSCG Type Approval
Decision Guide: Choose if: you need a low‑cost, SOLAS‑mandatory Inmarsat‑C solution for voice and low‑rate data on small to medium vessels with limited deck space and power. Avoid if: the vessel requires high‑speed broadband, extensive data exchange, or operates in environments where antenna sky view cannot be guaranteed.
Use Cases: The mini‑C is typically installed on the bridge of coastal traders and support ships for distress signalling, routine position reporting, weather updates, and short text communications with shore offices. It serves as a backup to higher‑bandwidth systems and fulfills mandatory GMDSS requirements on vessels that are not equipped with broadband terminals.
500 FleetBroadband
432 kbps IP
· Navigation Data / Sensor
· Inmarsat FleetBroadband terminal
Service
Inmarsat FleetBroadband
Data rate
432 kbps
Voice
ja
Common Failures & Inspection Points
- Antenna stabilization failure
- Radome water ingress
- BDE board failure
Service: Standard FleetBroadband. Antenna radome gasket check annually.
Spare Parts: Sailor (Cobham): Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Compact, all‑in‑one unit with built‑in antenna simplifies installation
- Global coverage on Inmarsat L‑band network ensures reliable voice and email service
- Low power consumption suitable for vessels with limited electrical capacity
- Integrated remote management via FleetBroadband services enables diagnostics from shore
- Proven track record on a wide range of commercial and offshore vessels
Weaknesses
- Limited bandwidth (432 kbps) compared with newer terminals such as FleetBroadband‑2 or Iridium Certus
- Reported antenna stabilization failures can affect link quality in heavy seas
- Radome water ingress has been observed if gasket maintenance is neglected
- BDE (Baseband/Digital Electronics) board failures may require costly field repairs
- Higher subscription cost per megabyte than some competing low‑rate services
Typical Vessels:
Offshore supply vesselFishing vesselYacht / luxury cruiserSmall to medium bulk carrierContainer feeder ship
Certifications:
IMO Type Approval
Decision Guide: Choose if: you need a compact, globally‑covered voice and low‑rate data solution with proven reliability on vessels where installation space is limited. Avoid if: high‑bandwidth applications (e.g., large video streams) are required or you prefer the latest generation of satellite terminals with faster rates.
Use Cases: The Sailor 500 is typically installed on the bridge to provide crew communications, email, weather and navigation updates, remote monitoring of ship systems, and as a backup link for safety‑critical messages when operating in remote offshore areas.
250 FleetBroadband
284 kbps IP
· Navigation Data / Sensor
· compact low-profile satellite antenna
Service
Inmarsat FleetBroadband
Data rate
284 kbps
Voice
ja
Common Failures & Inspection Points
- Radome seal aging
- Lower gain in rough seas
- Power supply heat issues
Service: Smaller antenna = lower gain. Adequate for coastal/short-sea.
Spare Parts: Sailor (Cobham): Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Small radome (≈0.5 m) fits on vessels with limited deck space
- Integrated voice and data (up to 284 kbps) over the Inmarsat FleetBroadband network
- Quick installation and alignment; no mechanical tracking required
- Lower acquisition cost compared with larger FleetBroadband antennas
Weaknesses
- Limited bandwidth; not ideal for high‑volume data applications
- Performance degrades in heavy sea states due to lower gain
- Radome seal can age, leading to potential water ingress
- Power supply may generate heat and require additional ventilation
Typical Vessels:
Coastal cargo vesselsOffshore support / crew transfer vesselsFishing vesselsSmall tankers and product carriersFerries and passenger craft
Certifications:
USCG Type ApprovalDNV GL Class
Decision Guide: Choose if you need a low‑profile, cost‑effective satellite terminal for voice and modest data needs on coastal or short‑sea vessels with limited deck space. Avoid if the vessel operates in high sea states, requires high bandwidth (e.g., large cargo ships, cruise liners), or must meet stringent redundancy requirements.
Use Cases: Typical deployments include crew change communications, weather routing updates, e‑navigation reporting, remote monitoring of engine/auxiliary systems, and satellite telephone service on offshore support vessels and coastal traders.
150 FleetBroadband
150 kbps IP
· Navigation Data / Sensor
· L‑band satellite broadband terminal
Service
Inmarsat FleetBroadband
Data rate
150 kbps
Voice
ja
Common Failures & Inspection Points
- Limited bandwidth for modern needs
- Antenna tracking loss
- Obsolescence risk
Service: Minimum FleetBroadband. Being replaced by Fleet One or VSAT.
Spare Parts: Sailor (Cobham): Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Proven reliability with many years of service in the field
- Compact size and low power consumption suitable for small‑to‑medium vessels
- Integrated voice and data on a single unit, meeting GMDSS requirements
- Global Inmarsat coverage (except polar regions)
- Simple installation and straightforward operation
Weaknesses
- Maximum data rate of only 150 kbps limits modern crew‑welfare and IoT applications
- Antenna tracking can be lost in high sea states or if not properly aligned
- Older hardware approaching obsolescence; limited support for newer services (Fleet One, VSAT)
- No built‑in redundancy; a single point of failure for both voice and data
- Limited scalability – upgrading bandwidth requires full equipment replacement
Typical Vessels:
Offshore supply vesselsTugboatsCoastal cargo shipsFishing vesselsSmall tankers and product carriers
Decision Guide: Choose if: you need a cost‑effective, proven solution for basic voice calls, email, weather fax and low‑rate telemetry on vessels with limited bandwidth demand; you already have legacy Sailor equipment or require strict GMDSS compliance. Avoid if: the vessel requires high‑bandwidth services such as video conferencing, real‑time sensor streams, crew welfare portals, or you are planning a long‑term upgrade to newer Inmarsat Fleet One or VSAT systems.
Use Cases: The terminal is typically installed on vessels that need reliable voice communications and modest data exchange for tasks like crew welfare email, weather updates, AIS position reporting, engine performance monitoring, and remote diagnostics where high throughput is not essential.
Intellian
2
GX60
60 cm Ka-Band
· Navigation Data / Sensor
· compact Ka‑band satellite terminal
Service
Inmarsat GX
Antenna size
60 cm
Band
Ka-Band
Common Failures & Inspection Points
- Pedestal motor failure
- Radome UV degradation
- ACU firmware issues
Service: Compact FX antenna. Suitable for vessels up to 100 m.
Spare Parts: Intellian: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Small footprint – fits on vessels where space is limited
- Integrated antenna and modem simplifies installation and commissioning
- Supports Inmarsat GX service with high‑speed broadband (up to ~30 Mbps downstream)
- Designed for vessels up to 100 m, covering a wide range of small‑to‑mid size ships
- Lower power consumption compared with larger gyro‑stabilised antennas
Weaknesses
- Limited antenna gain relative to larger gyro‑stabilised GX terminals – lower performance in marginal weather
- Reported pedestal motor failures can cause downtime if not proactively maintained
- Radome UV degradation over time may require periodic replacement
- ACU firmware issues have been noted, necessitating regular software updates
- Bandwidth caps are tighter than on larger GX systems, which may limit data‑intensive operations
Typical Vessels:
Offshore supply vesselTug & bargeCoastal ferryFeeder container ship (≤100 m)Coastal tankerResearch / survey vessel
Decision Guide: Choose if: you need a compact, cost‑effective GX broadband solution for vessels up to ~100 m and have limited deck space; you value easy installation and lower power draw. Avoid if: the ship requires maximum antenna gain for harsh sea states, high sustained data rates beyond GX60 limits, or you cannot accommodate periodic maintenance of the pedestal motor and radome.
Use Cases: The GX60 is typically installed on small to medium offshore support vessels, coastal ferries, and feeder ships operating in regional trade routes where reliable broadband for navigation, crew welfare, and operational reporting is required but deck space and weight budgets are constrained.
GX100
100 cm Ka-Band
· Navigation Data / Sensor
· Ka-band stabilized maritime antenna
Service
Inmarsat GX
Antenna size
100 cm
Band
Ka-Band
Common Failures & Inspection Points
- Higher weight/wind load
- Pedestal bearing wear
- BUC failure
Service: Larger antenna for better performance in rough seas.
Spare Parts: Intellian: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- High data rates (up to ~50 Mbps) on the Inmarsat GX network
- Large aperture improves link margin in heavy seas and adverse weather
- Dual‑polarisation and full‑motion stabilization maintain connectivity during vessel maneuvers
- Future‑proof Ka‑band platform supports voice, broadband and IoT services
Weaknesses
- Significant weight and wind load require reinforced mounting structures
- Pedestal bearing wear reported in long‑term service
- Integrated BUC can be a reliability weak point
- Higher power consumption and installation cost compared with smaller L‑band terminals
Typical Vessels:
Cruise shipsOffshore support vesselsLNG carriersContainer shipsLarge tankersResearch vessels
Decision Guide: Choose if: you need high‑capacity broadband on a large vessel operating in rough seas and can accommodate the antenna’s size, weight and mounting requirements. Avoid if: vessel size or deck strength is limited, budget constraints are tight, or lower‑bandwidth L‑band solutions suffice.
Use Cases: The GX100 is commonly installed on deep‑water vessels that require reliable high‑speed communications for crew welfare, real‑time operational data transfer, remote monitoring and satellite teleconferencing, especially where sea state can degrade smaller antennas.
Addvalue
1
Wideye iFleetOne
100 kbps
· Navigation Data / Sensor
· Inmarsat Fleet One terminal
Service
Inmarsat Fleet One
Data rate
100 kbps
Common Failures & Inspection Points
- Small antenna gain limits
- Voice quality
- Firmware stability
Service: Budget Inmarsat option for fishing and small commercial.
Spare Parts: Addvalue: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Low purchase and subscription cost – budget option for fishing and workboats
- Compact, integrated antenna reduces installation effort
- Supports both voice (VoIP) and low‑rate data services on a single platform
- Web‑based remote monitoring and configuration tools
- Designed for vessels under 30 m with limited deck space
Weaknesses
- Small antenna gain limits performance in rough sea states or high latitudes
- Voice quality can be degraded, especially during heavy traffic or bad weather
- Reported firmware stability issues requiring periodic updates
- Data rate capped at ~100 kbps – insufficient for bandwidth‑intensive applications
- Limited to Inmarsat Fleet One service; no higher‑speed options
Typical Vessels:
Fishing vesselsCoastal cargo / small bulk carriersWorkboats and utility craftOffshore supply boats (under 30 m)Research or survey vessels with modest communication needs
Decision Guide: Choose if: you need an affordable, easy‑to‑install satellite link for basic voice and low‑rate data on a small vessel and can tolerate limited performance in adverse conditions. Avoid if: high‑bandwidth applications, mission‑critical voice clarity, or operation in harsh weather are required; larger vessels may benefit from higher‑gain antennas and faster terminals.
Use Cases: Typical deployments include daily position reporting, email, AIS over satellite, remote engine monitoring, crew welfare calls, and limited data exchange for small commercial operations where cost is a primary driver.
Inmarsat
1
FleetXpress
Ka-Band VSAT
· Navigation Data / Sensor
· Ka-band VSAT with L-band backup
Service
Inmarsat Global Xpress
Band
Ka-Band
Data rate
50 Mbps
Common Failures & Inspection Points
- Ka-Band rain fade
- Antenna size and weight
- High airtime costs
Service: Premium Inmarsat VSAT. Guaranteed global coverage excl. poles.
Spare Parts: Inmarsat: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Up to 50 Mbps downlink enables crew welfare and real‑time e‑navigation services
- Dual‑antenna architecture provides automatic L‑band redundancy if Ka‑band is degraded
- Global coverage (except high latitudes) meets IMO GMDSS Class A requirements
- Low latency (~150 ms) suitable for video conferencing and remote monitoring
Weaknesses
- Ka‑band performance can be reduced by heavy rain (rain fade)
- Antenna size and mounting weight are larger than typical L‑band terminals
- Higher capital cost and airtime rates compared with lower‑throughput solutions
- Limited coverage near the polar regions
Typical Vessels:
Container shipsTankersBulk carriersCruise linersOffshore support vesselsLarge fishing vessels
Certifications:
IMO GMDSS Class A (Performance Standard)IEC 60945 marine equipment standardUSCG Type ApprovalDNV GL approval
Decision Guide: Choose if you need high‑bandwidth, globally available connectivity with automatic L‑band backup for critical bridge and crew welfare applications. Avoid if budget constraints dominate or the vessel operates primarily in polar regions where coverage is unavailable.
Use Cases: FleetXpress is typically deployed on vessels that require real‑time weather routing, video conferencing, eCDIS updates, remote machinery monitoring, and high‑quality crew entertainment streams, especially on long‑haul trades and offshore operations.
JRC
1
JUE-501 FleetBroadband
432 kbps IP
· Navigation Data / Sensor
· Inmarsat FleetBroadband terminal
Service
Inmarsat FleetBroadband
Data rate
432 kbps
Common Failures & Inspection Points
- Antenna stabilization
- BDE unit failure
- Radome seal aging
Service: JRC FleetBroadband. Integration with JRC GMDSS.
Spare Parts: JRC: Ersatzteile per Hersteller-Netzwerk. Lead time: 1-4 Wochen. Backup-Systeme an Bord pflichtgemäß.
Strengths
- Integrated GMDSS capability meets mandatory distress signalling requirements without extra hardware
- Compact footprint and low power draw suit medium‑size vessels and offshore platforms
- Automatic antenna stabilization maintains link quality in heavy seas
- Proven reliability with a long service history on commercial fleets
- Straightforward integration with JRC bridge consoles and existing ship IT networks
Weaknesses
- Maximum data rate limited to 432 kbps, insufficient for bandwidth‑intensive applications
- Historical issues reported with antenna stabilisation mechanisms and radome seal ageing
- BDE (Baseband Data Equipment) unit failures have been observed in older installations
- Higher acquisition cost compared with newer low‑cost L‑band terminals offering similar speeds
- Limited upgrade path to higher‑speed FleetBroadband services without hardware replacement
Typical Vessels:
Offshore Supply VesselFishing VesselCoastal Container ShipSmall TankerCruise Ferry
Certifications:
IMO Performance Standard D‑2USCG Type ApprovalCE Marking
Decision Guide: Choose if you need a single, integrated voice/data/GMDSS solution on a medium‑size vessel with proven reliability and global L‑band coverage. Avoid if your operation requires high‑speed broadband (>1 Mbps), or if you prefer newer hardware with lower acquisition cost and fewer known mechanical wear points.
Use Cases: The JUE‑501 is typically installed on offshore support vessels, coastal traders and fishing fleets to provide distress alerting (MMSI/DSC), email, weather fax, AIS data exchange and remote monitoring of ship systems where only modest bandwidth is required.