Wheelmark + SSAS/LRIT Certified

LT-3100S GMDSS System
Thrane, Lars Thrane, Iridium, Iridium Phone, Iridium Satellite Phone, Citadel, Iridium Piracy Solution

Iridium GMDSS Solution

  • LT-3100S GMDSS System

    Key Features:
    • SOLAS GMDSS Approved (Sea Areas A1, A2, and A3)
    • 100% Global Distress Coverage
    • Distress Alert & Distress Call
    • Safety Calling & Safety Messaging
    • Maritime Safety Information (MSI)
    • Support for remote Alarm Panels
    • Support for GMDSS Printer
    • Support for Bridge Alert Management (BAM)
    • Ship Security Alert System (SSAS)
    • Long Range Identification and Tracking (LRIT)
    • Voice, SMS, & Modem Data
    • Single antenna cable solution (up to 500 m)
    • High-performance GNSS/GPS receiver
    • Webserver for configuration and maintenance
    • MED Module B+D, RED(CE), FCC, ISED, ROHS2, Iridium

  • LT-3100S GMDSS System

    • LT-3110S Control Unit
      • Weight: 658 g (1.45 lbs)
      • Dimensions: 224.0 x 120.0 x 70.0 mm (8.82 x 4.72 x 2.76 in)
      • Temperature, operational: -15°C to +55°C (+5°F to +131°F)
      • IP rating, dust and water: IP32
    • LT-3120 Handset Unit
      • Weight: 290 g (0.64 lbs)
      • Dimensions: 208.8 x 52.8 x 38.2 mm (8.22 x 2.08 x 1.50 in)
      • Temperature, operational: -15°C to +55°C (+5°F to +131°F)
      • IP rating, dust and water: IP32
    • LT-3130 Antenna Unit
      • Weight: 687 g (1.51 lbs)
      • Dimensions: 151.1 x Ø 149.5 mm (5.95 x Ø 5.89 in)
      • Temperature, operational: -40°C to +55°C (-40°F to +131°F)
      • IP rating, dust and water: IP67

  • LT-3100S GMDSS System – Basic

    In The Box:
    • LT-3110S Control Unit
    • LT-3120 Handset
    • LT-3121 Cradle
    • LT-3130 Antenna Unit
    • Bracket Mount, Control Unit
    • Power Cable, 3m
    • Stainless steel A4 screws for mounting
    • User & Installation Manual
    • Unit Test Sheets


In 2018, the IMO’s Maritime Safety Committee (MSC) recognized Iridium as Recognized Mobile Satellite Service (RMSS) for GMDSS as an alternative to Inmarsat C.
The LT-3100S GMDSS system is so far the only Iridium GMDSS terminal available. It meets all standards and certification requirements needed for GMDSS communications equipment (MED, Wheel mark).

LT-3100S GMDSS – developed and manufactured by Lars Thrane A/S – offers Distress Alert, Safety Voice, and Maritime Safety Information (MSI) as well as Ship Security Alert System (SSAS) and Long Range Identification & Tracking (LRIT).

The LT-3100S GMDSS system has voice and data capabilities with 100% global coverage. The LT-3100S GMDSS system consists of a control unit, handset, and antenna unit. A single cable solution connects the control unit with the antenna unit. Using a standard coaxial cable, up to 500 meters of separation between the units can be obtained, giving freedom to mount the antenna in the best possible location, with free line of sight to the satellites.

The LT-3100S GMDSS system is designed for the Iridium GMDSS Safety Services and can be used as the primary satellite communication product on vessels, covering the basic communication needs in terms of connectivity between the ship and shore. The LT-3100S GMDSS system also provides voice, SMS, data, vessel tracking, and other Iridium services with competitive airtime rates, making it the perfect satellite communication product on board any vessel.

The LT-3100S GMDSS System is designed and built for the demanding and rough environment at sea and with an operational temperature range from -40⁰C to +55⁰C (-40⁰F to +131⁰F).

The LT-3100S GMDSS system is very easy to install. Everything is included in the box to get started with the installation and operating the LT-3100S GMDSS system. The control unit can be installed using either a bracket mount or flush mount. The antenna unit can be mounted using a pole mount for either 1.5″ or 2.0” pipes. The control unit has a large 4.3″ TFT display, from where the system can be operated with overview and ease. The built-in webserver can be used for service and maintenance.

More than 40 years of experience have been put into the design and construction of the LT-3100S GMDSS system, with an exceptional performance and specification level.

Where to buy the LT-3100S GMDSS System

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CFO and Co-Founder

After having earning his engineering degree Hans joined Thrane & Thrane in 2003 as a young development engineer.
During his time at Thrane & Thrane Hans has been involved in DSP programming, type approvals and project management.
His area of responsibility was within maritime and aeronautical mobile satellite communication.

Hans left Thrane & Thrane in the summer of 2014 to be part of the new founding team at Lars Thrane A/S.
Hans Thrane holds a Bachelor Degree in Electronic Engineering from the Technical University of Danmark.

Phone: +45 88 30 10 11


CTO and Co-Founder

Carsten joined Thrane & Thrane in 1997 as a young hardware development engineer. Throughout the years he grew to a position within Thrane & Thrane as a Senior Project Manager within the Maritime Development Unit.

During his time at Thrane & Thrane Carsten has been working on all levels of development and business development within Maritime, Land mobile and Aeronautical Terminals.

Carsten holds a Yachtmaster, 3rd class certificate and a SRC Certificate.
In his spare time, he likes to sail, dive and hike in the mountains.

Carsten holds a Higher National Degree in electronics engineering and a PMI Certification in Project Management.

Phone: +45 88 30 10 12


Chairman and Founder

Lars Thrane established Lars Thrane A/S in the summer of 2014.

Lars originally founded Thrane & Thrane in 1981 and has as CEO and technical Mastermind been the main creative and management force behind the very successful growth and performance of the company in its first 30 years. Under Lars’ leadership, Thrane & Thrane developed a reputation as the leading manufacturer of mobile satellite communications in the world.

In addition to Lars’ accomplishments at Thrane & Thrane, he is also a passionate pilot, holding certificates for multi-engine turbine powered aircraft and helicopters.

Lars holds a Master of Science Degree in Electronics Engineering and a Ph.D. in Satellite Communications from the Technical University of Denmark

Phone: +45 88 30 10 20


CEO and Co-Founder

Peter Thrane was a co-founder of Lars Thrane A/S in the summer of 2014.

Peter has 10 years of experience with development of satellite communication equipment from Thrane & Thrane. Peter has worked with maritime, land and aeronautical satellite communication development programs. Most recently he has worked on an aeronautical FAA Level-D DO-178C/DO-254 certification project.

Privately, Peter holds a certificate on a single engine piston aircraft and holds a maritime Yachtsman of 3rd degree.

Peter holds a Master of Science Degree in Electronic Engineering from the Technical University of Denmark

Phone: +45 88 30 10 10


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