There is a commercially-sold passive radar reflector that is up there at 10m2. It's called th Tri-Lens, Luneberg lens reflector. The smaller model is nowhere near 10m2, but the larger model, which weighs 13 pounds, is.
Before looking at it, though, you might read this:
http://www.tri-lens.com/practical_sailor.txt
...here's an advertisement for it at Defender... cha-chinnngggg.. $500
http://www.defender.com/product.jsp?path=-1|118|107602|275622&id=303311
West Marine sells the little model, which is about 2.5 m2, for $150
http://www.westmarine.com/webapp/wcs...3&classNum=109
By all accounts the Mobri sucks, has all sorts of valleys in its response and only works even halfway well at very narrow angles of heel. Still and all, they're easy to get into the rigging, they don't have a lot of windage, and I've found an ebay seller that makes a knockoff for $15 instead of $70. That's cheap enough that you can put 3-4 of them around the boat, at assorted points, slung at different angles and hope that at least one of them will be "right" at any given time.
That's been my hope and prayer...three Mobri knockoffs in the rigging and an Echomaster on a stern mount about 10 feet off the water.
Last edited by AlanH; 10-19-2007 at 03:20 PM.
1968 Selmer Series 9 B-flat and A clarinets
1962 Buesher "Aristocrat" tenor saxophone
Piper One Design 24, Hull #35; "Alpha"