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DTE, Data Terminal Equipment is an end instrument that converts user information into signals or reconverts received signals.
Emergency Position Indicating Radio Beacon - It is used as a distress alerting system, indicating to SAR authorities both the identity and position of a person or a vessel, which is in grave and imminent danger and requires immediate assistance.
Forward Error Correction, telex mode used to send mainly priority message (distress, urgency or safety) from one transmitter to many receivers
Global Maritime Distress and Safety System - The GMDSS is an important part of the IMO (International Maritime Organisation) SOLAS (Safety Of Life At Sea) convention. It is an internationally agreed-upon set of safety procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships.
Global Positioning System - Utilizing a constellation of at least 24 Medium Earth Orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its location, speed, direction, and time. GPS receivers may be found also on ships, for example as a part of navigational equipment and in some models of EPIRBs. They are usually connected to DSC radio communication equipment, for example VHF radio.
Gross Tonnage - Size of the ship, calculated as a function of the volume of all ship's enclosed spaces.