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Head office: Great Yarmouth, UK

Regional head office: Chandler, Arizona

Regional head office: Perth, Western Australia

Regional head office: Singapore

Our exclusive packages

40% Off Anker Ka-band

Enjoy summer with 40% off Anker Ka-band with AST

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AST OPTIMA package

The all-inclusive 12 or 36-month fixed fee Iridium Certus® package for maritime

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Iridium Certus® Cashback Promotion

Promotional credit for swap out of Iridium or selected hardware

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Iridium GMDSS

The Iridium GMDSS service remains the only, truly global GMDSS services in the market with 100% coverage. The service gives the maritime industry access to critical safety services anywhere on the globe

Click here to contact us about our GMDSS services

The Iridium GMDSS service is available through the Lars Thrane LT-3100S GMDSS terminal, a truly versatile safety system. The terminal not only provides all the required GMDSS Distress Alerting and Iridium's unique voice support but also offers non-safety features all in one package.

  • NEW - Meet SOLAS compliance  Available with SSAS and LRIT functionality 
  • Reliable global coverage  100% coverage including Polar Regions and Sea Area A4
  • Safety Voice  Speak to an operator within 30 seconds of pressing the red distress button
  • ​Maritime Safety Information (MSI)  Access navigational, meteorological and safety-related updates
  • Medical Assistance and Advice  Making sure you get the necessary support you need in a medical emergency

Why Iridium GMDSS?

The Iridium GMDSS service enhances safety at sea for mariners, offering reliable coverage in sea areas where no other option exists. 

LT-3100S Iridium GMDSS Terminal

The LT-3100S GMDSS Terminal from Lars Thrane A/S is the leading GMDSS solution for the Iridium GMDSS service.  It provides, not only, the key services for GMDSS compliance - such as Distress Alert and Maritime Safety Information (MSI) - but also incorporates non-GMDSS features - non-priority voice, data and SMS - in one small form factor terminal.

LT-3100S Iridium GMDSS Terminal

Iridium GMDSS Distress Alerting

Activated by the press of a button, distress alerting sends critical data to the Rescue Coordination Centre (RCC)

  • ID
  • Status
  • Position

Once a distress alert is confirmed, the highest priority voice call is automatically made directly to the RCC.

Iridium GMDSS Distress Alerting

Iridium GMDSS Safety Voice

In just 30 seconds connect to an RCC and other maritime authorities through a call to share additional details about the distress situation. 

The only GMDSS service with voice functionality. 

  • High priority calling
  • Hydrographic reporting (navigational dangers)
  • Medical advice and assistance
Iridium GMDSS Safety Voice

NEW - SSAS and LRIT Functionality

Iridium are continually looking at ways to provide added functionality and provide users with access to life-saving services.

Ship Security Alert System

Upgrade to Iridium's Ship Security Alert System (SSAS) to protect your crew from piracy and terrorism threats. Using the Lars Thrane LT-3100S Terminal Kit you can silently request onshore assistance by using a hidden button to transmit an alert.

This will also help those vessels needing to comply with the SOLAS convention. 

Long Range Identification and Tracking

LRIT functionality has now been in-built into the LT-3100S terminal. As a global satellite-based system for real-time ship identification and tracking, LRIT automatically transmits the ships position at least every six hours and can be polled on-demand to report their current position.

Having this in-built into the LT-3110S removes the need for additional hardware for those vessels looking to meet SOLAS compliance.

NEW - SSAS and LRIT Functionality

Maritime Safety Information

Maritime Safety Information (MSI) is transmitted through and Enhanced Group Call (EGC) service called Iridium SafetyCastSM.

  • Navigational
  • Meteorological
  • Safety-related
Maritime Safety Information

Added Value

Additional features and benefits of the LT-3100S terminal and the Iridium GMDSS service:

  • Distress alert relay
  • Shore-to-ship distress calling
  • Maritime assistance
  • Standard maritime calling and messaging
Added Value

Iridium GMDSS FAQs

Still have questions about Iridium GMDSS?  

Read our FAQ's

Iridium GMDSS FAQs

Get in touch

Finding the perfect solution, wherever you are.

For further details or to request a call from one of our sales team please contact us on
info@theastgroup.com