On Thu, 12 Apr 2007 19:04:25 -0400, Peter Hendra wrote:

Great idea. I have been in situations where the ships can visually see
me but I do not appear on their radar screen - sea state and waves
etc. - I have the old metal "forget what it's called" aluminium sphere
permanently swinging at my cross trees.

The best way to be seen on someone else's radar is to have your own radar
turned on.

Matt O.