Typically I only deploy my TA to full length if I am trying to get triangulation for quick distance estimation on sphere contacts or if I am trying to drag the TA under a layer (a tactic that is critical for success in submarine combat in DW 1.03).
If I am making a turn or depth change, I never leave my TA at farther than half length because it takes longer for the TA to come about and stablize after the manoever.
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LW
 
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