The complete Iridium Certus® 200 GMDSS solution — distress, safety, and everyday connectivity in one SOLAS-approved system, with 100% global coverage.
The LT-8100S is a GMDSS VHF DSC Class A radio supporting all GMDSS VHF radio requirements for SOLAS vessels. It is Wheelmark approved and fully compliant and tested towards the newest SOLAS and IMO type approval, carriage, and performance requirements — bringing Lars Thrane’s design philosophy to the most essential radio on the bridge.
The radio is a clean two-box solution: a control unit at the operating position and a transceiver unit that powers the entire system and carries all internal and external wiring — no extra interconnection boxes required. A single connection cable links the two, with up to 50 metres of separation, and the system grows with the installation: up to four additional Handset PTTs, Remote Controls, or Control Units connect directly via the transceiver unit.
Operation is deliberately straightforward. A two-display design keeps the radio channel permanently visible on its own display while the general display handles DSC functionality, settings, and detail. The interface is push-button — no touch — so it works with wet hands, gloves, and in heavy weather. DSC is implemented to be intuitive: a dedicated DISTRESS button broadcasts a Distress Alert on channel 16 at 25W, and the radio handles up to 7 simultaneous DSC sessions with the active session clearly marked.
On the bridge side, the transceiver unit connects to the systems a SOLAS installation expects: Bridge Alert Management (BAM) and position input over RS-422, VDR and speaker outputs, a discrete alarm input, and four AUX ports for additional equipment. Configuration and service run from a PC Service Tool over USB-C, connected at either the control unit or the transceiver unit. Like every Lars Thrane product, it requires no scheduled maintenance and is built for the demanding environment at sea.
Type-approved for GMDSS service across Sea Areas A1, A2, and A3, with MED and Wheelmark certification. The LT-4200S meets the mandatory safety requirements for compliant maritime operation worldwide.
A dedicated DISTRESS button broadcasts on channel 16 at 25W after a deliberate 3-second press. The radio handles up to 7 simultaneous DSC sessions, with the active session clearly marked — so safety communication stays manageable under pressure.
Integrated Ship Security Alert System (SSAS) and Long Range Identification & Tracking (LRIT) bring security alerting and position reporting into the same certified system.
The radio display always shows the channel number and related information; the general display handles DSC, settings, and detail. The essentials stay visible at all times — no menu-diving to find the channel.
A deliberate no-touch interface: physical buttons that work with gloves, spray, and cold — exactly when a safety radio has to. Service and configuration run from a PC tool over USB-C.
Connect up to 4 additional Handset PTTs, Remote Controls, or Control Units via the transceiver unit, plus BAM, VDR, alarm, and four AUX ports for additional equipment — one radio, the whole bridge covered.
| Title | Date added | Download |
|---|---|---|
| 98-105330 LT-8100S VHF Product Sheet Rev. 1.00-WEB | 04-06-2026 | Download |
| Control Unit | Weight: 658 g (1.45 lbs) |
|---|---|
| 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) |
| Antenna Unit | Weight: 3.70 kg (8.16 lbs) |
A complete Iridium Certus® 100 GMDSS solution — distress, safety, and everyday connectivity in one SOLAS-approved system, with 100% global coverage.
The world’s first Iridium GMDSS terminal — distress, safety, and everyday connectivity in one SOLAS-approved system, with 100% global coverage.
A compact and robust satellite communications system powered by Iridium Certus® 200, designed to deliver 100% global coverage for vessels of any size.
