Lars Thrane LT-3100S Iridium GMDSS Satellite Communications System

The Lars Thrane LT-3100S Iridium GMDSS is a premier maritime satellite communication system designed by Lars Thrane A/S to provide 100% global coverage for safety and operational communications. It is the first Iridium terminal certified for Global Maritime Distress and Safety System (GMDSS) services, offering a reliable and cost-effective alternative to traditional satellite safety systems. This Lars Thrane system ensures connectivity even in the most remote polar regions (Sea Area A4).

Engineered for professional mariners, the Lars Thrane LT-3100S integrates distress alerting, safety voice, and maritime safety information (MSI) into a single, compact terminal. Beyond safety, the terminal provides high-quality voice and data services for daily bridge operations and crew welfare.

Key Product Features

• Full Lars Thrane GMDSS Certification: Supports Distress Alert, Safety Voice, and Maritime Safety Information (MSI) through Iridium’s certified safety services.
• 100% Global Coverage: Powered by the Iridium LEO constellation, providing pole-to-pole coverage, including Sea Areas A1 through A4.
• Lars Thrane Distress Button Protection: Features a dedicated, protected Distress button to prevent accidental activation while remaining accessible for emergencies.
• Integrated GNSS/GPS: The built-in GNSS receiver ensures high-accuracy position reporting for distress alerts and navigation.
• Lars Thrane Single Cable Architecture: The antenna and control unit are connected by a single coaxial cable (up to 500m), simplifying installation and reducing wiring complexity.
• Advanced Bridge Interface: Features a high-performance 4.3" TFT display with day and night modes for optimal visibility in all bridge lighting conditions.

What’s Included

The Lars Thrane LT-3100S system is a comprehensive maritime kit containing:

• 1x LT-3110 Control Unit with 4.3" Display
• 1x LT-3120 Handset and Cradle
• 1x LT-3130 Antenna Unit
• 1x Bracket Mount and Power Cable
• 1x Lars Thrane User Manual and Installation Guide

System Capabilities

• Lars Thrane Distress Alerting: One-touch emergency notification to Rescue Coordination Centers (RCC) with precise vessel location.
• Safety Voice: High-priority voice communication for coordination with rescue authorities.
• Iridium SafetyCast: Receives vital MSI, including navigational warnings, meteorological forecasts, and safety-related information.
• Bridge Communications: Supports standard satellite telephony and data for operational and commercial use.
• Ship Security Alert System (SSAS): Optional Lars Thrane integration for anti-piracy and security alerting.

Technical Specifications

• Frequency: 1616 MHz – 1626.5 MHz (Iridium)
• Display: 4.3" TFT-LCD, 480 x 272 pixels
• Power Input: 12 – 24 VDC nominal (10.8V to 32V supported)
• Power Consumption: 10W (Typical), 45W (Max)
• Operating Temperature: -25°C to +55°C (Control Unit); -40°C to +55°C (Antenna)
• Ingress Protection: IPX6 (Control Unit); IP67 (Antenna)
• Max Cable Length: Lars Thrane supports up to 500m of coaxial cable (RG-214 or similar).

Ideal Applications

• Commercial Shipping: Essential for SOLAS-compliant vessels requiring a primary or secondary GMDSS system.
• Fishing Vessels: Reliable safety and weather monitoring in extreme northern and southern latitudes.
• Workboats & Tugboats: Compact safety and voice communication for coastal and offshore operations.
• Luxury Yachts: High-performance Lars Thrane bridge communication with integrated emergency support.

Product Information

• Product Category: Maritime Satellite Communications / GMDSS
• Manufacturer: Lars Thrane A/S
• Network: Iridium (Iridium GMDSS Service)
• Model: LT-3100S
• Approval: MED (Wheelmark), FCC, IC, CE
• Warranty: 12 Months

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