Inmarsat Fleet Family   -  Fleet  77   55   33  

In touch and online

    Benefits  Range of versatile solutions to suit your needs

Whether you work in merchant shipping, fishing, coastal protection or research, our Inmarsat-Fleet family (77, 55 & 33) will meet your communications and safety needs at sea.

Voice, fax, and data communications for both ocean-going and coastal vessels, delivered via a range of antenna sizes to suit different types of vessel.

Make phone calls, as well as access email and the internet using Mobile ISDN, or stay online all the time with the Mobile Packet Data Service (MPDS), where you only pay for the data sent and received

What is the difference between ISDN and MPDS?

  • ISDN is available over both Fleet 77 and 55. It delivers a constant data stream at speeds up to 128kbps and is best used for sending or receiving large files and images, voice communications, fax and videoconferencing.
  • The Mobile Packet Data Service (MPDS) is ideal where network transmissions are more frequent, less urgent or involve smaller amounts of data. Pay for the amount of data sent and received, not the time spent online, making it practical and cost-effective for email and web browsing. Available over Fleet 77, 55 and 33. 









Fleet 77 is designed to meet telecoms & safety needs aboard merchant vessels:
  • cost-effective & secure communications on all oceans
  • IMO (International Maritime Organization)-approved as a part of the Global Maritime Distress & Safety System (GMDSS).

Fleet 55 is ideal for medium-sized vessels such as coastguards boats, coastal fishing boats & large leisure yachts. It provides global coverage for telephone calls, spot coverage for fax, e-mail & data.



The Fleet 128  add-on service doubles bandwidth to 128 kbps, offering high throughput at cost-effective rates. And no need to change terminals.


Fleet 33 is compact, and at very affordable prices, it is ideal for smaller vessels such as coastal fishing and small leisure boats. It provides standard telephone, fax, small file exchange, email and Internet.


Features   Applications Fleet Coverage

Your mobile office at sea

Key features:

  • Secure voice, fax & data communications on all oceans.
  • Highly reliable service.
  • Compact, small and light terminals.
  • High-speed connection with data throughput of up to 128 kbps.
  • Greater control over fleets of terminals.
  • Wide range of value-added services to optimize your terminal. See SkyFile® Mail’s least cost router  automatically selects the most cost-effective transmission mode.


Support all key vessel applications:

  • Telephony
  • Email, internet access
  • Weather and chart updates
  • Vessel tracking
  • Crew calling
  • Fax
  • Text




A wide range of maritime communications solutions


  Fleet F77
  Fleet F55   Fleet F33
  Global voice & data   Global voice
Spot data & fax   
  Global voice
Spot data & fax
  Global/digital   Global/digital
Data (circuit switched)  

64 kbps ISDN (Euro standard)
128 kbps (on option)

  64 kbps ISDN (Euro standard)
  9.6 kbps data service
Data (MPDS)
   MPDS standard fit (max 65 kbps)   MPDS standard fit (max 65 kbps)   MPDS data service (max 28.8 kbps)
  2.4 kbps
9.6 kbps
64 kbps
G4 fax
  9.6 kbps
64 kbps
G4 fax
  9.6 kbps
GMDSS Distress & Safety
  Voice IMO A888(21)
  Not available
  Not available
Antenna size & weight
  75-90 cm diameter
30-70 kg
  50-60 cm diameter
18 kg
  30-40 cm diameter
8 kg
Choose between circuit mode (ISDN) with a constant data stream (Fleet 77 & 55), and packet mode (MPDS, mobile packet data system).
With MPDS you only pay for volume of data sent, rather than time spent online.
Stay always ahead with EX4U Telecom's solutions
SkyFile® Mail: compress emails, faxes & SMS by up to 90%, saving time and money. Also benefit from crash recovery, anti-virus & anti-spam protectino, a remote configuration tool & least cost router.
  Terralink Data Manager: set your own firewall-filters, administrate your account profiles, and select traffic priorities.
SkyFile® Access: free FTP space to exchange large files and access to native internet tools.
  Terralink Interconnect: connect your ship with a seamless link to the corporate network in total security with our range of interconnection solutions.
SkyFile® Weather: provides customizable professional weather information, high resolution satellite images and more.
  SkyFile® Video: edit, compress & send videos at low cost.
Universal Card: multi-satellite network operator card for prepaid voice, SMS and email.
  Satellite Direct®: enables you to palce satellite calls from any location to any satellite terminal, universal & flexible solution.
Traffic Monitoring System: full control over SIM cards and call-time credit for each mobile terminal.
  Satellite Direct Plus®: highly cost-efficient fixed-to-mobile calls.

YES Secure 3G,4G, WiFi
YES Secure micro SD for encrypted Voice calls & SMS, are the only secure option for mobile phones on the market with NO backdoors!   They contain no »proprietary« or »secret« encryption, no backdoors, no key-escrow, no centralized or operator-owned key generation, and require no key registration. For Satellite, GSM, ISDN, PSTN, WLAN, VoIP.

Secure encryption: STU/STE secure services enable communications at highest security level.





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