Divers can also find wrecks by asking other divers. Dive shops and clubs are good sources of information. Regardless of how easy it is to obtain the coordinates of a wreck, a Loran C or GPS is necessary to get there. Once the charted position is reached, the fathometer or depth sounder can be used to pinpoint it. Never anchor over a shipwreck.
Anchors can damage wrecks, and have been known to pull wooden wrecks apart.
Ideally, the anchor should be set down-current from the wreck. This way, divers can descend via the anchor line, and have the wreck in front of them. They can also use the anchor line to ascend when the dive is finished. Determining which way the current is flowing can be difficult. A small wreck float is an inexpensive and easy way to figure current direction.