GMDSS & IAMSAR Vol. III

Question 1

GMDSS

What are the three main search patterns?

Answer 1

For witnessed MOB:

1. Expanding Square search - good over a small search area
2. Sector Search -

How would you know / determine your search leg lengths?
What are you searching for? Person? Liferaft?
What are the weather conditions? Wave height, visibility?
Look at table inside IAMSAR - “uncorrected sweep widths for merchant vessels”

For unwitnessed MOB:

1. Creeping line search - in collaberation with yachts tenders? While waiting for SAR helicopter / professional help

Question 2

GMDSS

What are your actions in the event of a MOB?

Answer 2

1. Turn towards casualty
2. Mark the position (GPS MOB button on all equipment)
3. Release MOB buoy / lifering with smoke
4. Sound General Alarm / Sound OSCAR and Raise flag (3 long blasts)
5. Make decision regarding manoeuvre (Williamson, Anderson Sharnov)
6. Lookouts posted with binoculars + instructions to keep eyes on MOB
7. Rescue boat team to must and brief
8. Send out distress message

Question 3

GMDSS
How long will your reserve power sources last?

Answer 3

• Emergency generator 18 hours
• Batteries only 6 hours
  
  • Both will power steering, bridge equipment, fire pump and bilge pumps etc

Question 4

GMDSS
What would be an OK reading for your emergency GMDSS battery during your daily checks?

Answer 4

• 13.2 V
• Hydrometer to check battery acid - PPE!
• Distilled water