SG-303/307 WHIP ANTENNA MANUAL
© SGC 2007
SMALL METAL-HULLED SPEED BOAT
Use the metal structure of the boat for ground purposes. Follow the installation instructions of the
coupler and the SG-303/307 antenna as described for a vehicle installation.
SMALL FIBERGLASS-HULL SPEED BOAT
Mount the antenna on the bow. Use 3 ground straps laid in the bottom of the boat with the ends
tied on the engine ground to create a proper RF ground on your boat.
RF Grounding
All other metal structures in the vessel, such as the engine, railing, stove, metal fuel and water
tanks, etc. must be tied and bonded with the ground strap grounding system. In all cases never
install the antenna next to a metal structure; it must be at least 2 feet away. Always mount the
antenna above any metal structure to provide the best radiation and proper operation.
FINAL IMPORTANT NOTE
The SG-303/307 must be at least 4 feet away from any VHF, CB, GPS, Loran, or other antenna
system already existing on the boat or vehicle. Also clear rigging by 4 feet.
Antenna
Coupler
1-3” Ground Foil
Engines