I doubt that would have any perceptible affect.

As I understand it, radar works when the waves are reflected BACK.  Although
a patch of foil
would reflect, most of the time it would be reflecting SOMEWHERE ELSE, not
BACK.  Hence the
design of radar reflectors.  Incoming radar signals bounce into the corners
and get directed
BACK.

Some people have stuffed a garbage bag with crinkled aluminum foil but with
pretty marginal results
too.

I think your best results would be had with a bona fide radar reflector or
two and securite calls on the
vhf and a perhaps a floodlight.

Of course around here on Lake Erie most folks would not have their vhfs on
let alone even HAVE a 
radar.  Most every year someone plows into a breakwall at high speed.  When
someone is bent on doing
that it's best just to stay out of their way. :-)

Tod

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of MC Carpenter
Sent: Friday, December 03, 2004 10:45 PM
To: Montgomery Groups
Subject: M_Boats: can not be seen on small radar


Friend of mine was sailing hard to get to shore before dark, did not quite 
make it, and was running to reach the ramp when he was run up on to from 
behind by a power boat, apart from a few scratches and a lot of rough words 
no one was hurt. The power boat said it was level and running blind except 
for the radar. Heavy overcast, no moon. He said the radar did not detect the

small sail boat.If it had the alarm would have gone off.  It tested fine 
after the event.  EVEN with the long aluminum mast up 20 some odd feet. 
Apart from the obvious please, like should not be there, carry a radar 
reflector, etc. If he was to glue an aluminum foil strip say 3 inches by 10 
inches on the sail near the peak, would that square inches of flat surface 
be enough to change the odds of being seen, the round mast apparently was 
not enough surface area.

I don't know what frequency the radar was on (what band) its the small LCD 
type, and don't know which band can see the smaller area on a flat plane, 
again apart from the obvious,  wave height, angle of radar to level of 
water, speed,  etc..  The reason I suggested the 3 by 10 inches size is I 
believe that was the size used to confuse the anti aircraft artillery when 
night flying over Germany. It didn't look much larger than that. 



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