"Jeff Morris" wrote in message
news:KMWdnVfP3-WqMorfRVn-

The first item, a Davis Radar reflector, is a good item. I keep one
folding up as a reserve to the Firdell mounted high on the mast. The
second, a Mobri, is considered by many to be useless. "Essential
invisible" according to the US Sailing test.

http://www.ussailing.org/safety/Stud...ector_test.htm

Thanks for that link.....We get lots of fog around here...(some summers..a
full month's worth).
I didn't realize how useless the common cylinder type reflectors were. We
had one high up on the backstay of the Mirage 33 I crewed on and had a false
sense of security. I'll think twice before I buy a unit for my much smaller
Sandpiper 565.