GMDSS Flashcards
Receipt of a distress message, VHF in Mid Atlantic
Ch 16. Send RT Acknowledgement immediately.
Gather as much information as possible
Consider MAYDAY RELAY
Proceed to casualty at best speed
Establish comms with CRS and other vessels proceeding to distress
Prepare for assist (+ rescue boat)
X band for SART
Additional look outs
Medical station
Receipt of a distress message, VHF in Area A1 (Solent)
Ch 16 . defer short time to allow coast stations to answer.
Send RT Acknowledgement.
Gather as much information as possible
Consider MAYDAY RELAY
Proceed to casualty at best speed
Establish comms with CRS and other vessels proceeding to distress
Prepare for assist (+ rescue boat)
X band for SART
Additional look outs
Medical station
Receipt of a distress message, MF in Mid-Atlantic
Ch 2182. Acknowledge immediately by RT.
Gather as much information as possible
Consider MAYDAY RELAY
Proceed to casualty at best speed
Establish comms with CRS and other vessels proceeding to distress
Prepare for assist (+ rescue boat)
X band for SART
Additional look outs
Medical station
Receipt of a distress message, HF in any area
Tune in to appropriate station. listen for comms.
DO NOT ACKNOWLEDGE
If no shore acknowledgement, relay ashore.
GMDSS, what is it?
The Global Maritime Distress and Safety System (GMDSS) is an internationally agreed upon set of procedures, types of equipment, and communication protocols used to increase safety and make it easier to rescue distressed ships, boats and aircrafts.
Subject to commercial vessels over 300 GT.
Navtex
international, automated system for distributing MSI which includes:
-(A) nav warnings
-(B) met warnings
-(D) SAR info
-(L) add. Nav warnings
opt:
-(E) Met forecasts
518 kHz
If you hear a mayday in the middle of the Atlantic
Log it
Inform Master
Transcribe Message
RT acknowledge (call + message)
mayday
their C/S x3
this is my C/S x3
RECEIVED MAYDAY
Position relative to incident
my speed is..
my ETA is
I SAY AGAIN
Over
MAYDAY
grave and imminent danger, immediate assistance required.
MIPNANOO
MAYDAY RELAY
by RT
MAYDAY RELAY x3
ALL STATIONS/SHIPS x3
this is own vessel x3 C/S x3 MMSI
MAYDAY
distress vessel x3 C/S x3 MMSI
in position
Nature of distress
RIA
No. of POB
Over
Sea Area A1
Area A1 is an area within coverage of at least one VHF coast station in which continuous DSC alerting is available, i.e. approx. 20-30 miles, or line-of-sight, from coasts.
Sea Area A2
Area A2 excludes Area A1 but is within coverage of a shore-based MF coast station, i.e. approx. 100 miles.
Sea Area A3
Area A3 excludes Areas A1 and A2 but is within coverage of an INMARSAT geostationary satellite in which continuous alerting is available.
Sea Area A4
Area A4 excludes Areas A1, A2 and A3 but covers the remaining sea areas of the world, i.e. mainly the Polar regions.
ALRS Volume for GMDSS
Volume 5
Minimum equipment for GMDSS ships
- VHF radio transmitting DSC on channel 70, and
radiotelephony on channels 16, 13 and 6. - 1x SART if under 500 GT, 2 x SARTs if over 500 GT.
- 2 x portable VHF transceivers for use in survival craft < 500 GT,
x 3 if > 500 GT. - NAVTEX receiver, if the ship is engaged on voyages in any area where a
NAVTEX service is provided. - Inmarsat EGC receiver, if the ship is engaged on voyages in any area of
Inmarsat coverage where MSI services are not provided by NAVTEX or HF.
