Doug,
Put a two ounce lead up your line, followed by a bead. Next tie on a swivel,with one foot of line attatch one end to the swivel, and the other to a marker foat. Cast out, tighten up to the lead, then pull line off your reel in one foot lengths,counting how many foot lengths of line you pull off, until the float appears on the surface. This also tells you what depth you are at.