GMDSS Sea Areas

Area 1
Within VHF range of Coast Stations fitted with DSC (30-40 nm)

Area 1, 2
Within MF range of Coast Stations fitted with DSC (150 nm)

Area 1, 2, 3
Within the area covered by Inmarsat Satellite System

Area 1, 2, 3, 4
Polar Regions (above 70° N and below 70° S)

Under SOLAS, every ship while at sea, must have the facilities for essential communications, namely:

  • Transmitting ship-to-shore distress alerts by at least two separate and independent means
  • Transmitting and receiving shore-to-ship distress alerts
  • Transmitting and receiving ship-to-ship distress alerts
  • Transmitting and receiving search and rescue coordinating communications
  • Transmitting and receiving on-scene communications
  • Transmitting signals for locating receiving maritime safety information
  • Transmitting and receiving general radio communications to and from shore-based radio systems or networks
  • Transmitting and receiving bridge-to-bridge communications