You fellas are really losing it. This is getting funnier and funnier! Hotrod is upset because I am a professional writer that has been published many times for reviews and advice stories in several professional journals and magazines. Itsa is claiming a beautiful German woman leaning against a tree is a man, and the other members of the gang of nine have been reduced to just mumbling.
Getting Bacck to the Sand Shark, Awendaw, be sure to go back to page 12 in the manual and MAKE SURE you have set your tone frequency to match YOUR hearing the best. Do you hear high or low tones better? Next, set your pulse width to about 3/4 power (2-230pm position). Turn your threshold up to where you can barely hear it above the waves and wind noise - like a mosquito hum, and use the machine in NORMAL mode.
DO NOT just walk up or down the beach in one direction or the other! Pick yourself a 50-yard long beachfront, and start gridding it. You start at the wet sand high mark and detect right into the water thigh-deep, move over a step and detect right back up to the high wet sand mark.. Rinse and repeat until the whole 50-yards or 5-hours is done.