Seajet
...
Having been myself caught in the middle (not technically separation zone if you mean the bit *between* the dover and off-casquettes tss but I know what you mean...) in thick fog without GPS or radar in my earlier sailing days....Weren't you concerned that tacking backwards and forwards in a strip 5 miles wide with fog and no landmarks for...what...24 hours?..was likely to introduce a rather worrying error into your estimated position?
Good point Laika, but my chum and I were taking it very seriously, like the maths exams I hate but on this occasion I had reason to concentrate on the tidal vectors etc as did my chum.
It took a lot out of us though, as I say we were knackered when we reached St Peter Port.
At the first point just as we hit the fog on the southern shipping lane, we heard a big ship's engines approaching, then the sound of the bow wave - I was holding onto our only white flare and I don't mind admitting my hands were shaking - but I still stupidly hung on as it was our only shot.
Instead I dived for the engine in its well and we raced away into the zone at what seemed to be 90 degrees to the sound of the bow wave - we never saw the ship or any lights but got severely rocked...
We got away with it, by sheer luck not judgement.