I guess this seems like an obvious question, but just asking it to make sure...

Obviously Gherant protects a ship until it attacks, then normally he'd discard. (Crew) Vader can discard a crew DURING the attack to get a reroll.
Sooo...Gherant ship sidles up to an enemy ship, protected his own ship by his effect, begins an attack on the enemy ship, (Crew) Vader discards him for rerolls, then 'after the attack' you'd have to discard him because you made an anti-ship attack...but you can't, he's already gone. No negative effect of that, nothing is lost or prevented along the way, Vader and Gherant both fully utilized.
That seems to be true, just checking...
Edited by xanderf