On Thu, 05 Jan 2006 12:09:53 GMT, Commodore Joe Redcloud
wrote:

Wayne,
50 feet? I don't think so. Check the transmitter specs and do the math.
Lamda = 3.18 u sec per mile, one way.
Steve



Wayne said "about 50 feet". The actual spec is 22 meters. Not that far off for a
casual remark.

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22 meters sounds about right, about 1 1/2 boat lengths perhaps
although it seems closer then that. I believe Furuno shortens up the
pulse length on the close in ranges to improve resolution.