Yeh, Larson makes an antenna that is designed for(insulated) vehicles
(thinkit is the "OS" series, 1/2 wave) , and also, it is possible to use
regular 1/4, and 5/8 wave antennas on such, useing Burglar alarm, or
"Waterproofing Repair Tape" ( 2 Inch aluminium tape), available at
Home Depot, or Lowes. Tho NOT at a 45 degree angle, should make a
adaquate counterpoise for your antenna, and can be on either side of
the roof! Give it a try! Jim NN7K


John Smith wrote:

Until recently, I owned an all fiberglass houseboat--beautiful rig.
However, on fresh water it offered no counterpoise properties whatsoever.

A continuously loaded 1/2 wave end fed vertical utilizing a modified
gamma match feed ended up the solution, and one which required a minimal
counterpoise.

Regards,
JS