have normal 213 coax.it goes across the yard about40 feet.laid boards over it so lawn tractor wouldnt smash it.been this way bout 3 years and lifted the board and noticed the coax now has sunk bout 2 inches into the ground.i read somwhere once they make specail coax that u can bury.was wondering if the way my regular coax is 2 inches under ground is ok....