[Svartalfiar]

It’s curious to some that a crew with a heightened alert status, fresh off a mission that defied a major national power, would not notice, or easily avoid a 600-foot Liberian oil tanker.

And how would such a crew not be able to avoid a tanker? They are nowhere near as nimble as a Navy ship. Even your GPS spoofing isn't going to cause them to be unable to avoid a collision. That's a major failure somewhere in the Navy, whether it's inadequate training, inadequate attention to detail, or a failure to maintain standards and basic Naval seamanship. And multiple incidents imply it's not just a single CO, wider spread in the Navy means something bigger is wrong.

[Yosemitest]

If you've just been zapped with an E.M.P Transmitter, and you have no power AT ALL,
then HOW are you going to stop, turn, or do anything to avoid a collision ?

USS Fitzgerald — The Victim of an Electromagnetic Warfare Attack