Came across one of these in 1941, just north of Londonderry.
It was illuminated fore and aft by two tall 'mast-like' structures and had lights showing amidships. Completely stationary.
The 'Ship Spotted' alert identified it is a 'Control Ship'. Have never come encountered one of these before, in years of playing SH3.
The other funny thing is that I could not 'lock-on' and get a firing solution.
Not that I would have sunk it ; just really curious about what exactly it was.
Its got me.
.