Very dark, starless night off North Cape; SHAR sent to investigate non-squawking contact behaving oddly 90 miles north of the ship. Steely-eyed ace goes in lights-off and radar silent and manages to position himself close underneath a "large aircraft". Unable to identify what it was, said ace pops on the anti-collision light in order to illuminate the underside of the target. This was greeted by an urgent stage whisper on Guard, "Sea Harrier underneath the Nimrod - F*** off!!!"
Ah, how we laughed!