The small print on these cards says 'only one card per player per ship per turn'. I have been playing it as 'one card per player per ship per playing opportunity'.
Does this mean that if a card was played on a ship earlier in the turn then you cannot play one later? The ship potentially has one Maneuver attempt of its own plus multiple ramming/spar attacks to fend off.
Your interpretation in the first paragraph is correct, 'one card per player per ship per playing opportunity'.