In the couples news interview video she said that after the ship hooted 5 times they “altered course 2 degrees, so that they could see we made a deliberate change of course”.

That might be a “miss-speak”, but it’s nowhere near a large enough deflection to let anyone know they have been seen.

If any warship honked at me half way across the channel I’d be turning directly away from them as quickly as possible, under sail or not.