What is Williamson turn?
Williamson turn:
- Makes good original track line.
- Good in reduced visibility.
- Simple & Slow procedure.
- Takes the ship farther away from the scene of the incident.
- Rudder hard over (in an immediate action situation only) to the side of the casualty.
- After deviating from the original course by 60 deg. The rudder hard over to the opposite side.
- When heading 20 deg’s short of the opposite course, rudder to midship position and the ship to be turned to opposite course.
What is single turn/ Anderson turn?
Single turn or Anderson turn:
- Fastest recovery method.
- Good for ships with tight turning characteristics.
- Used most by ships with considerable power.
- Very difficult for single screw vessels.
- Very difficult because approach to person is not straight.
- Rudder hard over (in an immediate action situation only) to the side of the casualty.
- After deviation from the course by 250 degs rudder to midship position.
- Stopping manoeuvre to be initiated
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