Download Brochure

For more detailed information about features and system requeriments of Vox Maris, download the following document: IRIS DSC Brochure.pdf

Sobre el GMDSS

The Global Maritime Distress and Safety System (GMDSS) is an international system that uses terrestrial and satellite technology and ship-board communication systems to ensure rapid, automated alerting of shore-based communication and rescue authorities, in addition to ships in the immediate vicinity, in the event of a marine distress.

The basic concept is that Search and Rescue (SAR) authorities ashore, as well as shipping in the immediate vicinity of the ship in distress, will be rapidly alerted through satellite and terrestrial communication techniques so that they can assist in a co-ordinated search and rescue operation with the minimum of delay.

GMDSS uses several communication devices based on terrestrial technology (for example VHF, MF and HF radios, Navtex, radio telex, SART, etc.) and satellite technology (Inmarsat, EPIRBs, GPS).

The progress reached by digital technology allowed the creation of the Digital Selective Calling (DSC) service, a global automatic system within the GMDSS for transmitting and receiving distress and safety communications.

Digital Selective Calling (DSC) has many advantages compared to the traditional system based on oral communications:

  • The information is transmitted in digital form, not spoken, avoiding the possibility of oral interference by other radios
  • The distress alert is made with immediacy and safe delivery
  • The distress alert is automatically transmitted, making it possible to handle other tasks during the emergency
  • The distress alert is automatically repeated to all the stations (ashore and vessels). A Coast Station which receives a DSC distress alert will send an "acknowledgment" (known as "ACK") and will implement appropriate procedures in order to launch Search and Rescue operations with a minimum of delay
  • The distress alert automatically includes the identification number (MMSI) of the vessel. The MMSI enables to the coast station that receives the call to have information (name, characteristics, etc.) of the vessel in distress (there is a worldwide MMSI Directory that allows to identify each vessel).
  • If the radio device is connected to a GPS, the position of the vessel is automatically included in the alert
  • The distress alert is received by any vessel having a DSC equipment on board, giving zonal universality to the distress alert
  • In addition to Distress alerts, DSC includes other kinds of calling: Security, Urgency, Routine, Distress Relay, Position Request

DSC Authorities, for the implementation of the DSC service in a country or geographic region, require a basic technological infrastructure that involves communications equipment, antennas, transmitters, receivers, etc. This equipment is distributed in several Shore Stations operated by skilled radio operators, in order to cover the entire territory under its jurisdiction. In turn, the authorities DSC are in constant contact with search and rescue authorities (Search and Rescue - SAR) to provide support to situations of distress, safety and urgency.

About Advenio Software

The name Advenio is a Latin word that means to arrive. In our professional activity, we consider very important to achieve our goals working with firmness, enthusiasm and perseverance.


20 de Septiembre 1925, 2nd Floor, Office D
B7600CUM Mar del Plata
Buenos Aires - Argentina
Tel/ Fax:  +54 (223) 495-1795 

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