Reading ship lights can be more difficult when you are in a busy shipping
lane ( you have the lights from two ships overlapping each other) each going
in different directions, or a narrow channel where you have shore lights
(white lights and even green and red stop lights) confusing the situation.


"Don White" wrote in message
...
*JimH* wrote:
..........lights?

You say you are an expert? So pass this quick test.

http://www.boatsafe.com/flash/reviewlights.html
Thanks Jim...that's a good review , especially for daysailors like me who
don't do a lot of night sailing...yet.