top of page

Williamson turn, One turn (Single turn, Anderson turn), and Scharnov turn

1.Williamson turn

Advantage -

  • makes good original track line

  • good in reduced visibility

  • simple

Disadvantage -

  • takes the ship farther away from the scene of the incident

  • slow procedure

Execution of Williamson turn -

  1. Rudder hard over (in an "immediate action" situation, only to the side of the casualty).

  2. After deviation from the original course by 60°, the rudder hard over to the opposite side.

  3. When heading 20° short of the opposite course, the rudder to the midship position and ship will be turned to the opposite course.


2.One turn ("Single turn, Anderson turn")

Advantage-

  • fastest recovery method

  • good for ships with tight turning characteristics

  • used most by ships with considerable power

Disadvantage-

  • very difficult for a single-screw vessel

  • difficult because the approach to a person is not straight

Execution of Anderson turn-

  • Rudder hard over (in an "immediate action" situation, only to the side of the casualty).

  • After deviation from the original course by 250°, rudder to midship position

  • and stopping manoeuvre to be initiated.


3.Scharnov turn


Advantages-

  • will take the vessel back into her wake

  • less distance is covered, saving time

Disadvantages-

  • cannot be carried out effectively unless the time elapsed between the occurrence of the incident and the commencement of the manoeuvre is known

Execution of Scharnov turn-

(Not to be used in an "immediate action" situation.)

  • Rudder hard over.

  • After deviation from the original course by 240°, rudder hard over to the opposite side.

  • When heading 20° short of opposite course, rudder to midship position so that ship will turn to the opposite course.

4,693 views0 comments

Comments


  • Facebook
  • Instagram
bottom of page