On Sat, 30 Jul 2005 19:41:03 GMT, Me wrote:

In article et,
"Roger Derby" wrote:


In general, I tend to agree with "me" that the sea is the significant ground
plane if we're talking small boats (under 65').
400 sq.ft. of copper is 20' x 20' or so. The wavelength of 4215 KHz is 75
meters = 277 feet.

Roger

Roger has it right on....Not much Moss growing under hs feet.....

Me

I just had a wild guess that if Roger was agreeing with anonymous
poster 'me' and me was agreeing with Roger, then Roger was probably
going to be in error too.

So I checked a Roger fact: that 4215 kHz = 75 meters = 277 ft.

Here's the scoop:
4215 kHz = 71.2 meters = 233.5 ft

Waddaya know!

:-)

Brian Whatcott