[in_vino_vomitus]

I feel like I've missed something obvious. where does the 30,000 yds fit in? I ask because I still get detected from time to time, and I'm keen to stop that. I work on the assumption that the horizon is about 4.5 miles away and escorts will spot me at 5. Also stern escorts will periodically change station from about a mile off the convoy's port/starboard quarter, to a position where they're trailing it by a couple of miles and and a couple of miles further out to port/starboard - so you need a pretty hefty comfort zone to avoid being spotted when that happens. I expect someone better at this than me will come along to clarify, but for me, if I can see the ships being escorted, then I'm too close to their escorts...