MOB

Question 1

List the 3 actions:

Answer 1

Immediate Action

Delayed Action

Person missing Action

Question 2

Morse fog signal for MOB & describe the flag:

Answer 2

Oscar

— — —

Yellow bottom diagonal red top

Question 3

Factors that affect recovery:

(8)

Answer 3

Manoeuvring characteristics
Capability of engine plant
Recovery technique
Crew experience & training

Wind direction & sea state
Visibility

Location of incident
Assistance from other vessels

Question 4

Williamson Turn:
Positives (3) and negatives (2)

Answer 4

Positives:
- Original track
- Restricted vis.
- Simple

Negatives:
- Slow
- Goes far from incident

Question 5

Anderson Turn:
Positives (3) Negatives (2)

Answer 5

Positive:
- Fast
- Ships with considerable power
- Ships with tight turning circle

Negative:
- Difficult for single screw
- Approach to casualty not straight

Question 6

Scharnov Turn:
Positive (2) Negative (1)

Answer 6

Positive:
- Come back on reciprocal course
- Fast

Negative:
- Cannot be done if elapsed time of incident is unknown

Question 7

Williamson turn execution:

Answer 7

Rudder hard over in direction of casualty (kick stern out)

When 60• off course turn rudder hard over in other direction

Rudder to midships when 20• off course

Question 8

Anderson Turn:

Answer 8

Rudder hard over towards casualty (kick the stern out)

Rudder to midship position when 250• from course

Question 9

Scharnov Turn execution:

Answer 9

[To take vessel back into its own wake]

Rudder hard over towards casualty to kick the stern out

When 240• off course rudder hard over in other direction

Rudder to midship position when 20• off course

Question 10

Factors affecting the length of legs of the EXPANDING SQUARE SEARCH pattern?
(4)

Where will recommendations for sweep distances be found?

Answer 10

Height of eye
Visibility
Sea state
Casualty size

Table in IAMSAR VOL.3

Question 11

Action of bridge team COMMUNICATIONS during MOB situation?

Answer 11

Update GMDSS equipment

Send MAYDAY (IAMSAR V.3)
OR URGENCY (BPG)

Distribute VHF for internal comms.

Question 12

Initial actions of bridge team during MOB situation?

(6)

Answer 12

Post lookouts (binoculars)

Hoist Oscar / fog signal

Hand steering

Wind speed & direction

Recovery manoeuvre

Question 13

**Initial action during MOB situation?

(6)

Answer 13

Lifebouy with smoke & light

Wheel over to side of casualty

Sound Oscar

Inform master

MOB on GPS

Inform Engine room

Question 14

Action of emergency team during MOB situation?

(3)

Answer 14

Muster

Launch rescue boat

Rig pilot ladder or other means of getting casualty onboard