GMDSS Sea Areas
GMDSS defines four sea areas based upon the location and capability of onshore-based communication facilities. The definition of the Sea Areas for GMDSS is outlined below.
Sea Area ![A1](/img/prev/en/markets/merchant/gmdss/index_img_001.gif)
Means an area within the adiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available, as may be defined by a Contracting Government.
Sea Area ![A2](/img/prev/en/markets/merchant/gmdss/index_img_002.gif)
Means an area, excluding sea area A1, within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available, as may be defined by a Contracting Government.
Sea Area ![A3](/img/prev/en/markets/merchant/gmdss/index_img_003.gif)
Means an area, excluding sea areas A1 and A2, within the coverage of a recognized mobile satellite service supported by the ship earth station carried on board in which continuous alerting is available.
Sea Area ![A4](/img/prev/en/markets/merchant/gmdss/index_img_004.gif)
Means an area outside of sea areas A1, A2 and A3.
Equipment Requirements GMDSS
General requirement for equipment and functions for all ships irrespective of the operating sea area
Equipment |
A1 |
A2 |
A3 |
A4 |
Applicable Model |
VHF telephony installation with DSC capable of:
- DSC watch on channel 70
- Radiotelephony watch on channel 16
- Watch on other appropriate frequency or frequencies for urgency and safety communications for the area in which the ship is navigating
|
○ |
○ |
○ |
○ |
FM-8900S |
MF telephony*6 installation with MF DSC capable of:
- DSC watch on 2 187.5 kHz
- Watch on other appropriate frequency or frequencies for urgency and safety communications for the area in which the ship is navigating
|
|
○ |
○ |
|
FS-1575/2575 |
SES providing RMSS
|
|
|
○ |
|
FS-1575/2575 |
MF/HF telephony*6 installation with DSC capable of:
- DSC watch on 2 187.5 kHz and 8 414.5 kHz
- Depending on time of day and geographical position, DSC watch on at least one of the frequencies 4 207.5 kHz, 6 312 kHz, 12 577 kHz or 16 804.5 kHz
- Watch on other appropriate frequency or frequencies for urgency and safety communications for the area in which the ship is navigating
|
|
|
|
○ |
FS-1575/2575 |
Duplicated VHF with DSC
|
○*7 |
○*7 |
○ |
○ |
FM-8900S |
Duplicated MF*6 with DSC
|
|
○*7 |
|
|
FS-1575/2575 |
Duplicated SES providing RMSS
|
|
|
○*4*5 |
○ |
|
Duplicated MF/HF telephony*6 with DSC
|
|
|
○*4 |
|
FS-1575/2575 |
Receiver(s) for MSI and SAR-related information*3
|
○ |
○ |
○ |
○ |
FELCOM18,NX-700A/B、NX-900,IB-585 |
Float-free EPIRB
|
○ |
○ |
○ |
○ |
Tron 60 AIS |
Radar SART or AIS SART
|
○*1 |
○*1 |
○*1 |
○*1 |
TBR-610 |
Portable GMDSS VHF transceivers
|
○*2 |
○*2 |
○*2 |
○*2 |
HT-649 |
Automatic updating of position to all relevant radiocommunication equipment
|
○ |
○ |
○ |
○ |
|
"Distress panel" and "distress alarm panel" (Only passenger ships)
|
○ |
○ |
○ |
○ |
|
Two-way-on-scene radiocommunication on 121.5 MHz and 123.1 MHz from the navigating bridge. (Only passenger ships)
|
○ |
○ |
○ |
○ |
|
*1 Cargo ships between 300 and 500 gt.: 1 set. Cargo ships of 500 gt. and upwards and passenger ships: 2 sets.
*2 Cargo ships between 300 and 500 gt.: 2 sets. Cargo ships of 500 gt. and upwards and passenger ships: 3 sets.
*3 This may be either a combined ship earth station and EGC receiver or separate pieces of equipment.
*4 Ships in sea area A3 may choose between duplication with either complete MF/HF transceiver or SES providing an RMSS with coverage equal to or broader than the primary RMSS (See section 1.6.3).
*5 See section 1.6.3.2.
*6 An MF/HF radio installation may substitute an MF radio installation.
*7 See section 1.6.3.1.