Parallel sweep search (PS)

bullet Used to search a large area when survivor's location is uncertain.
bullet May be used with single or multiple vessels.
bullet Commence search point (CSP) is one of the corners of the search area.
bullet CSP may be a corner of a sub area if a large area is to search.
bullet It is ½ track space inside the rectangle from each of the two sides forming the rectangle.
bullet Orientation is generally in the estimated direction of drift of the search object.

Parallel sweep search by one ship:

 

 

Parallel sweep search by two ships: