Ocean Shield reels the TPL in to to a shallower depth when turning and then lowers it again.
They MAY do this if they want to make a tighter turn, but you really try to avoid this when towing, as you lose all the time turning and not searching.
Typically you run a racetrack type of search pattern to optimize the depth and the search area.
While it is called mowing the lawn, it is not efficient to directly overlap paths, you just keep moving the entire racetrack over...
