I have an a/c that entered a ship's hex on its last FP at 0.1, but uses +0.1 OC to end at 0.2.
Does he roll for collision or does he clear the masts?
No mast collision if at 0.2 or above when entering the mast hex. Thomas has incorrect logic. OC does not negate a mast check if you enter the hex at 0.1 and then apply OC.
<<<This is a revised answer. I did not study the questions close enough earlier.
JD
(https://groups.io/g/FW-Ref-Central/message/3713) 25/02/2020
You need to enter the mast hex already above 0.1 alt. to avoid a collision check.
Adding OC after the fact does not negate the mast collision check if you are at 0.1 when you enter the mast hex or hexside or cross the mast hexside.
JD
(https://groups.io/g/FW-Ref-Central/message/3722) 01/03/2020