Dan wrote:
Evan Gatehouse wrote:

Ships can come over the horizon in about 10 minutes to your
position
if moving at say 22 knots.

AFAIK the horizon is 22 odd miles away. A ship moving at 22kts would
therefore take about an hour to get to you.


Sort of. A bunch of common misconceptions revolve around the "horizon".
Your horizon, the water perimeter you see will be around 2-3 miles
depending on your height. The ship on the other hand being much higher,
and with lights high up at night, will have much longer horizon of its
own. Couple those to get the distance at which you see it, and you are
looking at 15+ miles.

On the other hand, take one of those bloody cross channel cats at 40
Knots and it get s a bit more interesting.

PyroJames