Iridium GMDSS
The Global Maritime Distress and Safety System, commonly known as GMDSS, is a communication system that has transformed the way maritime distress and safety information is transmitted and received. Developed by the International Maritime Organization (IMO), GMDSS has significantly improved the safety and efficiency of communication at sea, ensuring that distress signals are promptly received and appropriate assistance is provided.
Prior to the implementation of GMDSS, maritime communication relied heavily on traditional radio systems. While these systems served their purpose, they had limitations in terms of range, reliability, and the ability to transmit distress signals effectively. This led to delays in receiving distress calls and providing assistance, which could be critical in emergency situations.
GMDSS, on the other hand, utilizes a combination of satellite and terrestrial communication systems to provide reliable and efficient communication services to ships and maritime rescue coordination centers worldwide. The system operates on several frequency bands and incorporates various communication technologies, including satellite communications, digital selective calling (DSC), and automatic identification systems (AIS).
One of the key features of GMDSS is its ability to transmit distress signals and emergency information to nearby vessels and rescue coordination centers automatically. When a ship encounters an emergency situation, such as a collision, fire, or sinking, it can activate the GMDSS distress alert system, which sends out a digital distress signal containing the ship’s identification and location information. This signal is received by nearby vessels and rescue coordination centers, enabling them to provide immediate assistance.
In addition to distress alerts, GMDSS also facilitates routine communication between ships and shore-based authorities. Ships equipped with GMDSS can communicate with maritime safety information broadcasts, weather forecasts, and navigational warnings, ensuring that they are aware of any potential hazards or changes in weather conditions.
Furthermore, GMDSS includes provisions for search and rescue operations. In the event of a distress signal being received, rescue coordination centers can quickly determine the location of the distressed vessel and coordinate search and rescue efforts efficiently. This capability has been instrumental in saving countless lives and reducing response times in emergency situations.
To ensure the effective implementation of GMDSS, ships are required to carry specific communication equipment, including VHF radios, MF/HF radios, satellite communication systems, and emergency position-indicating radio beacons (EPIRBs). These devices are designed to be interoperable and compatible with the GMDSS network, ensuring seamless communication between ships and rescue coordination centers.
In conclusion, the Global Maritime Distress and Safety System (GMDSS) has revolutionized maritime communication by providing a reliable and efficient means of transmitting distress signals and safety information at sea. This system has greatly enhanced the safety of mariners worldwide, enabling prompt response and assistance in emergency situations. With its comprehensive range of communication technologies and interoperable equipment, GMDSS continues to play a vital role in ensuring the safety and well-being of those at sea.
IRIDIUM has obtained GMDSS approval in 2020 and is currently rolling out service worldwide.
LARS THRANE Equipment
Lars Thrane A/S specializes in design and manufacturing of high-performance Iridium Satellite Phones, NMEA 0183 & NMEA 2000 Electronic Compasses, and GNSS & GPS Receivers, using the latest, innovative and ground breaking technology. With a strong background in satellite communications engineering, and experience in the development of maritime communications and navigation equipment, Lars Thrane A/S brings high performance products into the maritime world of tomorrow. Our products are for the maritime professional and leisure markets.
LARS THRANE Devices
Iridium Certus 200 GMDSS Solution
- 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)
- 3 x Voice Channels
- IP-data: up to 176 kbps (up / down)
- Single antenna cable solution (up to 150 m)
- High-performance GNSS/GPS receiver
- Webserver for configuration and maintenance
- MED Module B+D, RED(CE), FCC, ISED, ROHS2, Iridium
The LT-4200S GMDSS system is an Iridium Certus 200 GMDSS Satcom System. It meets all standards and certification requirements needed for GMDSS communications equipment (MED, Wheelmark).
LT-4200S 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).
PERFORMANCE
The LT-4200S GMDSS system has voice and data capabilities with 100% global coverage. The LT-4200S 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 150 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-4200S GMDSS system is designed for the Iridium Certus 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-4200S GMDSS system also provides voice, IP-data, vessel tracking, and other Iridium services with competitive airtime rates, making it the perfect satellite communication product on board any vessel.
The LT-4200S 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).
INSTALLATION
The LT-4200S GMDSS system is very easy to install. Everything is included in the box to get started with the installation and operating the LT-4200S 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 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-4200S GMDSS system, with an exceptional performance and specification level.
INTELLIAN Equipment
The recognized leader in maritime satellite communication, Intellian is the trusted provider of worldwide connectivity solutions for VSAT and satellite TV systems, using state-of-the-art RF antenna technology. Expanding into the next phase of continuous connectivity, Intellian is empowering satellite communication around the globe to provide access at any time, anywhere, on land, in the air, and at sea. Intellian’s feature-rich, future-proof technology, groundbreaking research and development, with a passion to embrace and overcome challenges is accelerating the availability of fast, reliable communications for everyone.
INTELLIAN Devices
Intellian C200M GMDSS System
- 100% Global Coverage
- Iridium Certus® GMDSS Service
- SOLAS approved (Wheelmark approval)
- Safety Voice, Safety Messaging & MSI
- Distress Alert & Distress Call
- Single Coaxial Cable Antenna Connection
- 3 x High-Quality Voice Lines
- 7” IPS TFT Full Touch Screen
- Supports non-emergency communications
- SSAS & LRIT functions supported
- Full set of accessories including power supply and optional keyboards
- Excellent warranty (3yrs parts + 3yrs labor at the factory)
The Intellian C200M is a next-generation maritime communication terminal that delivers full GMDSS functionality and global Iridium Certus connectivity. It combines distress alerting, voice, and data communication in one compact and integrated solution. Designed for maximum reliability and simplicity, it ensures safe and continuous operation anywhere on the planet, including the polar regions.
Global Coverage and Network
Unlike conventional GMDSS systems based on geostationary satellites, the C200M operates via the Iridium LEO constellation of 66 cross-linked satellites. This provides uninterrupted, low-latency global coverage – from the equator to the poles. Even in extreme weather or high-latitude environments, the system maintains stable connectivity and clear voice communication.
Safety and Compliance
The C200M is fully compliant with IMO requirements and certified under MED Wheelmark and UK MER (Red Ensign) standards. It supports all mandatory GMDSS functions, including one-touch Distress Alerting, Safety Voice calling, and reception of Maritime Safety Information (MSI). These features make it a dependable safety communication solution for any type of vessel.
Display and User Interface
The system features a 7-inch color touchscreen Safety Display Unit (SDU) with an intuitive interface and real-time monitoring. The display includes day, dusk, and night modes, automatic brightness control, and clear visibility under all lighting conditions. The operator can easily manage distress alerts, voice calls, and system status directly from the display.
Connectivity and Integration
The C200M provides flexible communication and integration options. It includes four PoE LAN ports and one WAN port for connecting external devices or integrating with VSAT systems. Built-in Wi-Fi, a network firewall, and a soft PBX with support for up to 16 SIP phones make it a fully functional onboard communication hub.
Performance and Reliability
With IP data speeds up to 176 kbps (both uplink and downlink) and multiple simultaneous voice channels, the C200M supports not only safety communication but also operational data, remote monitoring, and digital reporting. Its robust design ensures durability in marine conditions, while its compact size and low weight simplify installation and maintenance.
Applications
The Intellian C200M is ideal for commercial vessels, fishing boats, research ships, and unmanned surface vehicles (USVs). It enables global voice and data connectivity, regulatory compliance, and operational efficiency in a single, future-proof system.
Summary
The Intellian C200M is more than a GMDSS terminal – it’s a complete maritime communication solution. Combining safety, performance, and ease of use, it provides shipowners and operators with reliable global coverage, simple installation, and long-term compliance with evolving IMO standards.
Intellian C700 GMDSS System
- 100% Global Coverage via Iridium Certus 700
- SOLAS / MED Wheelmark approved (IEC 61097-16:2019 compliant)
- Distress Alert, Distress Call, Safety Voice, Safety Messaging, MSI
- Supports non-emergency daily communications
- SSAS and LRIT supported
- 7” IPS TFT Full Touch Screen with auto/manual dimming
- Intuitive UI for routine calls and GMDSS functions
- Single coaxial cable between ADU and BDU
- Bridge Alert Management (BAM) and ECDIS integration
- Full accessory set available (power supply, mounting kit, alarm button, alarm unit, optional printer/keyboards)
- Flexible bracket or flush mounting options with retrofit support
The Intellian C700 GMDSS System delivers uninterrupted maritime safety and communication capabilities anywhere on the planet, thanks to its Iridium Certus 700 connectivity. This ensures 100% global coverage, including polar regions, remote shipping routes, and high-latitude operations where traditional satellite networks may fail. Fully compliant with SOLAS requirements and certified under the IEC 61097-16:2019 GMDSS standard, the system provides a robust and future-ready safety solution for all vessel types. The MED Wheelmark approval confirms that the system meets stringent EU maritime safety regulations and is suitable for deployment across international fleets.
Bridge Terminal
The 7” IPS full-touch Safety Display Terminal is purpose-built for ship bridges, offering wide viewing angles, smooth interaction, and both auto and manual dimming for optimal visibility in bright sunlight or nighttime operations. Its user interface is designed to minimize crew workload and provide direct, rapid access to all GMDSS functions. Operators can initiate Distress Alerts, Distress Calls, Safety Voice sessions, and Safety Messaging with minimal steps, ensuring efficient response during critical moments. The terminal also displays Maritime Safety Information (MSI) clearly and reliably, helping bridge crew stay informed about navigational warnings, weather conditions, and operational hazards. In addition to emergency features, the terminal supports routine voice communication, allowing it to function as both a primary GMDSS device and a daily-use satcom terminal.
SSAS & LRIT
The system includes native support for Ship Security Alert System (SSAS) and Long-Range Identification and Tracking (LRIT), enabling vessels to meet IMO-mandated security and tracking requirements without adding extra hardware. This integration reduces complexity, cost, and installation time for ship operators. SSAS alerts can be transmitted through the same reliable Iridium Certus network, while LRIT reporting operates continuously and globally, providing position data even in remote, low-traffic sectors of the ocean. These capabilities make the C700 a comprehensive safety and compliance platform that supports both emergency communication and mandated vessel monitoring.
Easy Installation
The C700’s architecture is optimized for practical, low-complexity installation. A single coaxial cable connects the Above Deck Unit (ADU) and Below Deck Unit (BDU), significantly reducing cabling effort, points of failure, and installation time compared to multi-cable systems. This makes the solution ideal for both newbuild projects and retrofits. The system is engineered for integration with Bridge Alert Management (BAM) to ensure consistent alarm handling and situational awareness. It can also be connected to the vessel’s bridge navigation network, including ECDIS, allowing it to function as part of a coordinated onboard safety ecosystem.
Flexible Mounting
The system offers maximum flexibility for shipyards and integrators. The Safety Display Terminal can be installed using either a bracket mount or a flush-mount configuration, adapting to different bridge layouts and equipment panels. For vessels replacing older GMDSS equipment, the universal retrofit bracket helps cover existing console cutouts and reduces the need for carpentry or fabrication work. A complete accessory ecosystem is available, including power supplies, pole mounting kits, GMDSS alarm buttons, alarm units, and optional keyboards or printers, enabling full customization based on vessel type, regulatory requirements, and operational needs.
For All Vessels
The Intellian C700 GMDSS System is designed to meet the communication and safety needs of a wide range of vessel categories. Commercial cargo ships benefit from its global reliability and integration with critical safety systems. Passenger vessels and cruise ships gain a robust emergency communication platform that operates even in high-latitude expedition routes. Fishing fleets and workboats appreciate the durable construction, straightforward installation, and dependable MSI access. Large yachts and expeditions vessels gain a compact, high-performance GMDSS solution with worldwide reach. In all segments, the C700 provides a modern, compliant, and highly capable communication backbone designed for continuous operation in demanding maritime environments.
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