Doing this with last draft of rules, so apologies i test has changed. From P27 on PIP expenditure:
No PIP is expended by a first march move this bound if either (a) entirely along a road without reversing direction, or (b) a column mostly of Pikes that is moving straight ahead, or (c) naval in good going.
Later:
1 extra PIP is expended by a move requiring PIPs for each of:
So by my understanding the first march march move by naval in good going can do any of the difficult evolutions, move short, etc wiith no PIP expenditure. Correct?
Greg