I 



SURVIVAL AT SEA 



To execute this maneuver continue the initial Full Rudder until 

 60° from the original heading, then ordering the helm shifted. The 

 60" is about right for most ships. However, different ship types 

 may require from 30° to 80° change. The exact amount can be 

 learned only by trial and error during "dry runs". The ships heading 

 will normally just reach 90° from the original heading as it com- 

 mences to swing in the opposite direction. The turning should be 

 continued until the reciprocal of the original course is reached. 

 When the turn is completed, a ship should be heading back down her 

 original track approximately one turning diameter from the point 

 where the turn commenced. Thus, a careful search can be made 

 back along the former track— the advantage of the Williamson Tum- 



U. S, Coait Guard officmt phofogrophi 



23 



