"Steve Lusardi" wrote in
:

At 6.36usec per radar mile, the pulse width must be less
than 1usec and the receiver must be on within nano seconds after the
pulse transmission in order to sense a close target.
Steve


The little 2KW Raymarine can see the docks three slips away from about 22'
up Lionheart's mizzen. It draws so little DC power its pulse width has to
be very narrow, indeed. I know of someone else who regrets putting the
radar atop the mast at 55' on a sloop because the bouys disappear about a
football field length away from the boat with the same radar.

This observation of the Raymarine 2KW is taken when the radar is new, not
after the internal condensation problems of Raymarine radomes has eaten
away the potmetal chassis, rendering it useless. I just put the third
radome up the mizzen.

By the way, for the Raymarine 2KW owners, the new radome has these little
plastic feet to hold the radome up off the mounting by about 1/2 inch. The
mounting bolts go through a hole in these feet. Looks like a patch for the
problem of stainless steel bolts and pot metal holes they screw into making
another galvanic battery to eat the chassis off from the bottom.