IAMSAR Flashcards
What are the 8 visual distress signals?
- Red parachute flare
- Flames
- Red flare
- Orange or yellow smoke
- Repeatedly raising and lowering outstretched arms either side
- November and charlie flags
- Square flag with ball above or below it
- SOS
What are the immediate MOB actions?
- Position on GPS/ECDIS
- Release MOB buoy on side of casualty
- Sound MOB signal/shout Man Overboard
- Keep eyes on casualty if possible
What are the 4 Man Overboard turns?
- Williamson turn
- Anderson Turn
- Scharnov Turn
- Loren Turn
Describe the Williamson turn and its advantages
- Hard over towards the casualty
- When the heading is 60 degrees from original course, hard over the other side
- When the heading is 20 degrees from reciprocal of original course, midships the wheel
- Vessel will be on approach to past vessel track
Advantages
Good for immediate response
Simple
All ships are capable
End on the ships track for ease of retracing route
Describe the Anderson Turn
- Hard over towards the casualty
- When the heading is 250 degrees from original course, midships the wheel
- Vessel will be perpendicular to past vessel track
Advantages
Immediate response
Fast action
Quickest method for powerful and manoeuvrable ships
Describe the Scharnov turn
- Hard over
- When heading is 240 degrees from original course, hard over the other side
- When heading is 20 degrees from reciprocal of original course, midships the wheel
- Vessel will be on original track
Advantages
Ends on the past track
Covers less distance and faster than the Williamson turn for past MOB situations
Describe the Loren Turn
- Full speed into the prevailing conditions
- Half speed before casualty is abeam
- Turn towards the casualty and reduce speed to slow
- As the prevailing conditions come across the stern and casualty is abeam, increase speed to half
- As the casualty is abeam to windward, increase to full speed again sailing into the prevailing conditions
Advantages
Calms the water around the casualty for rescue
Rescue craft can be deployed during the turn
What are the initial actions for a fire?
F ind
I nform
R estrict
E xtinguish/ Escape
- Determine the class of fire - What’s burning?
- Determine extinguishing agent
- Determine method of attack
- Determine how to prevent spread
- Plan personnel and fire fighting assignments
- Establish communications between the fire location and the bridge
- Attack the fire
What are the initial actions for a grounding?
- Check hull for damage
- Sound tanks for cargo egress/water ingress
- Sound around the vessel to find deep water
- Assess wind/current/sea
- Assess position, seabed and navigational dangers
- Consider ballasting / lightening
- External communications
- Display lights and shapes a and sound signals
What are the initial actions following hull damage?
- Identify location of incoming water
- Isolate electrics in the area
- Attempt to block the damaged area to restrict water ingress
- Operate bilge pump
- Use any other auxiliary pumps
- Move to shallower water
- De-ballast affected area/ Create list/Trim
What are the initial actions following collision?
- establish communication with the other vessel
- Evaluate damage/injuries
- Inform RCC
- External communications
What actions could be required when proceeding to a distress?
- Prepare lifeboats for lowering to be used as landing stages and/or rescue facilities
- Prepare liferafts for launching either as landing stages or fendering
- Rig pilot ladders, embarkation ladders
- Rig safety lines along the sides of the ship
- Prepare heaving lines/manropes
6 Rig any safety nets with weighted bottoms under the water surface - Prepare the galley with warm drinks/food
- prepare the hospital/first aid kits/Defibs/blankets/TPA
- Post lookouts
- Assess weather conditions/forecasts
How do you develop a search plan?
- Establish a datum based on last reported position.
- Consider the type of casualty (size, type, sea anchor in use)
- Calculate estimated drift based on leeway and water current
- Select the correct sweep width based on visibility, size of casualty and weather conditions
- Draw a 10Nm search radius circle around the calculated datum.
- Draw a box with tangents to the circle to give the search area.
How should navigation within the search pattern be carried out?
Using dead reckoning and with a smoke float released at the datum position for reference
What are the 5 main search patterns?
- Expanding square - for 1 ship only
- Sector search - for 1 ship only (120 degree turns)
- Track search - For 1 or 2 ships either side of casualty past track
- Parallel Track search - using multiple ships
- Creeping line search - using a ship and an aircraft