megan,
I live and learn ! But why the odd 25 ft ? Wouldn't a round 300 ft be easier to fly ? To allow for the height of the flight deck above the waves, I guess. But why not do what we all actually did - just zero your ALT on the runway/deck before take off, I don't think the Navy flew for very long, and they mostly landed back on the ship they started from. And the ship would always give them a QFE anyway.
Strange seem the ways of the True Blue.
Danny.