They'll also call nearby warships
This is interesting, ducimus...
So we take the invisible bombs that lurker has in RSRD. Add some to all the maritime patrol planes. Wonder if there is any limit how many you could put on a plane?
Set them to do no damage at all (this is in addition to their bombs/DCs). If an H6K had MANY invisible, non damaging "bombs" it would stick around making pass after pass. Perhaps the longer it stays around, the more chance for warships to arrive...