A person could "clone" the swordfish, name it similarly, and make the default "Loadout" one of depth charges, and then assign that particular swordfish to the CV / CVE also... Have like a Torpedo Bomber "Swordfish", and an ASW "SwordfishASW", both in the AirGroups assigned to the ships... You'd never know what to look for from a swordfish attack, kind of like the Betty in the US Pacific side, where it can have bombs, depth charges or torpedo, with each plane having a unique loadout... It might also be though, that the swordfish(es??) you encountered had already used their explosive weaponry, and only had the machine gun left with ammo to use on your boat. lol