Thanks for the pointers chaps. I remember a mate of mine doing night astro out of Fininngly (Doncaster Robin Hood International javascript
:smilie('
')) in a Dominie on what was known as the south west route. During the long leg from Cromer down to the Scillies he had a go at his first 'cocked hat'. The first line went down the North Sea, the second along the English Channel and the third ran from Cornwall to Northumberland. He announced to the crew that they were over Coventry and had to alter course 30 degrees left! That cost him a few beers.
That was straight and level at FL350 breathing oxygen. I can only begin to imagine how early seafarers managed it tossing about in a small ship (fnarr fnarr). Respect due.
"Ekaton Smhnoz"
Bernoulli