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Global Maritime Distress and Safety Systems

Global Maritime Distress and Safety System


The Global Maritime Distress and Safety System (GMDSS) consists of several systems. The system is intended to perform the following functions:

Alerting (including position determination of the unit in distress)

Search and Rescue coordination

Locating (homing)

Maritime Safety Information Broadcasts

General Communication

Bridge-to-Bridge Communication

The system also provides redundant means of distress alerting, and emergency sources of power.


EPIRB: Emergency Position Indicating Radio Beacon
The 406 EPIRB, Tron 60S/GPS, is the latest contribution to Jotron`s already comprehensive product range. 

Tron 60S/GPS small and compact handheld size is a perfect supplement to meet the growing demand for smaller size EPIRB`s, both in Float-Free and as Manual versions.

SART: Search and rescue locating device
Technically, the Tron AIS SART is based on the following principals:

The unit will be programmed from the manufacturer with a unique ID code and receives its position via an internal GPS antenna. 

This ID code and Position data is combined and transmitted using the international AIS channels (AIS A and AIS B) in the maritime VHF band.


The high-performance NCR-333 NAVTEX integrates a high visibility LCD display, shares the same simple configuration as its predecessor and contributes to improved safety at sea. 

The NCR-333 receives NAVTEX broadcasts on the frequency channel 518 kHz, and either 490 kHz or 4209.5 kHz. 

The NAVTEX automatically receives broadcasts on the international standard frequency 518 kHz. 

Local transmissions of NAVTEX use the 490 kHz channel. 

The high frequency channel 4209.5 kHz is allocated for NAVTEX broadcasts. 

The NCR-333 also allows you to select and deselect certain types of information and coastal stations with the purpose of avoiding repeat broadcasts.


The SAILOR 6391 Navtex System sets new standards in functionality and flexibility for SOLAS mandated Navtex receivers. 

As a black box system, with separate touch screen user-interface, it introduces a new approach that enhances safety and efficiency, whilst being fully SOLAS compliant. 

It is a next generation system offering new installation and operation possibilities today, with the potential to become part of the fully networked bridge in the future. 

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