GMDSS Flashcards
Manditory Navtex messages
A Nav warnings
B Urgent weather warnings
D Search and Rescue
L Additional warnings not covered in A
Navtex station
518 kHz ( international )
490 KHz ( Local language )
HF frequencies at night and day
4, 6, 8 Mhz at Night
8, 12, 16 Mhz during the day
How to set up Navtex
Publications
Find nav area that you will be navigating through manually enter in stations for the areas in ALRS VOL 5. Then select the messages you would like to to recieve
ABDL ( manditory )
IAMSAR VoL 3
Daily GMDSS Checks
DSC internally
Batteries voltage
Printer paper
GMDSS log book entry
Weekly GMDSS Checks
DSC message to coastal station
Backup generator test
Check of battery area
Monthly GMDSS checks
EPIRB
SART
hand held radios
Battery condition ( load test )
Antennas and insulators
What are the 6 volumes of ALRS
Randy, madens, make, good, partners
Volume 1 Maritime Radio Stations
Includes details on global maritime communications, satellite communication services, coastguard communications, and more.
Volume 2 Radio Aids to Navigation
Covers VHF radio direction-finding stations, radar beacons, Automatic Identification System (AIS) aids to navigation, and radio time signals.
**Volume 3 ** Maritime Safety Information Services
Provides information on maritime weather services, radio weather and navigational warnings, NAVTEX and EGC services, and more.
**Volume 4 ** Meteorological Observation Stations
Lists all meteorological observation stations worldwide.
**Volume 5 ** Global Maritime Distress and Safety System (GMDSS)
Details worldwide communication requirements for distress, search, and rescue, including SOLAS and ITU regulations.
**Volume 6 ** Pilot Services, Vessel Traffic Services, and Port Operations
Includes detailed information on pilot services, vessel traffic services, and port operation
How many sea areas are there
4 SEA AREAS
A1
A2
A3
A4
You recieve a distress alert on sea A3. What are your actions
- Check what equipment for message recieved
- If VHF accept and switch to voice
- If not wait 5 mins and listen in for voice message.
- Write down all information and check position.
- Make chart, nav and weather assesment.
- Notify Master
- Master then should make assesment on weather we can be of assistance.
- Note everything in the GMDSS log book
- If on HF then I wouldn’t wake the master.
What is a SART
A Search and Rescue Transponder (SART)
is a device used in maritime situations to assist in locating vessels or people in distress.
Activation: When activated, the SART responds to radar signals sent from rescue vessels or aircraft.
Function: It transmits a series of dots and dashes that appear on the radar screen of the rescuing vessel, making the location of the SART and, hence, the distressed vessel or individual, visible on the radar.
Range: The effective range of a SART is approximately 5-6 nautical miles for a height of 1 meter above sea level. This range can extend to around 30 nautical miles if the SART is detected by an aircraft radar.
Standby Mode: 96 hours.
Active Mode: around 12 hours
What is an EPIRBS ?
Stands for
Emergency Position Indicating Radio Beacon.
Is a device that sends out a distress message to a geo stationary satilitle. The position of the EPIRB is position is then fixed to a 3 mile range by polor orbiting satilitles to a range of 3miles every 90mins.
Battery life is 48hours
What are signs of distress / signals
- Flares
- Sart (signals on the radar)
- Fire
- DSC messages on VHF and MF/HF
- Orange smoke
- Orange canvas with black square on it.
- Flags, N C
- Gun or Explosive Signal: Fired at intervals of about a minute.
- Continuous Sounding with Fog Signalling Apparatus: Continuous sound using fog signals
- Morse Code SOS: The group … — … in Morse Code
- People waving both arms up and down slowly
- Life saving equipment in the water
Your on route to an emergency. What actions can you do to prepare
- Prepare rescue tender and medical equipment
- Assign spotter to the fly bridge
- Assign lookout to radar x band look for SART
- Go through check list tool box talk to rescue team to ensure they know what information we have available.
- Ensure good communication with bridge and rescue team.
Requirements for vessel A1
VHF with DSC
Navtex
EPIRB
SART
Hand held GMDSS VHF radio 6, 13, 16
Additional Navtex messages
C - is Ice
E - is Met reports
Requirements of vessels in A2
Everything in A1 plus
MF radio with DSC
Requirements of A3
Everything in A1 and A2 plus
Inmarsat
Duplicated VHF
Requirement of vessels in A4
Doesn’t require inmarsat system, but does required additional MF_HF radio
Give me a mayday radio call
Mayday x3
this is vessel x3
Call sign x3
MMSI
Mayday
This is vessel name and call sign x1
Position
Nature of distress
Response required
Over
Give me a typical mayday relay message.
“Mayday Relay, Mayday Relay, Mayday Relay”
Identification: “This is [Your Vessel Name], [Your Vessel Name], [Your Vessel Name]”
MMSI: “MMSI [Your MMSI Number]”
Distress Information: “Mayday [Vessel in Distress Name], MMSI [Vessel in Distress MMSI Number]”
Position: “In position [Latitude and Longitude or Bearing and Distance from a Known Feature]”
Nature of Distress: “[Nature of Distress, e.g., Holed and Sinking, Man Overboard]”
Additional Information: “[Number of Persons on Board, Life Raft, etc.]”
Over: “Over”
If sending out an emergency radio message on MF HF what do you need to take into account
Refer to ALRS vol 1
find SRC channels
Refer to propergation tables for season and time of day frequency before transmitting.
