On Mon, 05 Apr 2004 00:18:32 +0000, Bruce in Alaska wrote:
snip

I haven't seen any published spec's for a Commercial Marine Radar
that has less than a 20 degree Vertical Beamwidth. I have been in the
Marine Electronics Field for better than 30 years. Can you privide some
documentation of a Commercial Marine Radar Antenna with a Vertical
Beamwidth of less than 20 degrees? "Most Boats" are Power Vessels and,
those that support Radars don't mount them on a pole in the aft quarter. I
will agree that, it is common these days to mount radar antennas on a
pole, for Sail Powered craft. It isn't the best place for radar antennas
to be mounted, just easier, and cheaper, for lazy installers.


Bruce in alaska

It strikes me that the "antennae on the pole" scenario just puts a bit
more radiation down the end of the boat where folk spend a good deal of
time standing near it, between that and an hf antennae....