In article ,
John Navas wrote:

On Tue, 22 Jan 2008 15:10:52 +0000, larry wrote in
:

Marc Heusser d wrote in
:

I have seen how unreliable echos from glass fibre reinforced polyester
boats are (and how unreliable echos at least smaller passive radar
reflectors of the 90ø aluminum sheets type give on quiet waters).

If you're going to buy anything to make you a big target on the SHIPS and
large yachts....buy an AIS TRANSPONDER, which makes you as big as an
aircraft carrier.

All ship over 300 gross tons now have full AIS aboard, as do the big
yachts, to make them look big.

True of commercial ships, but *not* of many pleasure craft.

Every boat that leaves the harbor should be AIS equipped, now.

"Let them eat cake?" And small comfort when one of them collides with
you. Until the world comes around to your PoV, a radar transponder is a
highly recommended safety device whether you have radar or not. I would
still use one even with AIS -- you can never have enough backup --
depending on a single device is just plain foolish.

and which do you think COSTS more, a Radar Transponder or an AIS
Transponder????