a lazer would be detectable from space and/or AEWCS
(please tell me we still have AEWCS)
We still have AWACS, and no, they can’t detect lasers.
I’m not sure that would be the case that an AWACS could detect a laser (correct me, please, if I’m wrong) and it’s unlikely an AWACS was on the scene anyway.
That said, I’m certain that a person who was in a position to know about secret manuevers by the ASW forces of two navies would be able to spell the word “navies,” I’m certain it would be impossible for a sub to engage an airplane that is a good hundred miles inland, so this email is a supertanker load of bovine diarrhea.