Divers can somehow tune out audible alarms on computers and watches when taunted by a challenging fish. Frequently perform your own visual air, depth, and time monitoring. As a result, spearfishing typically involves more dives during a day than typical sightseeing dives. A group of spearfishermen may make several dives with each dive of relatively short duration. This requires careful dive planning and management.
Planning dives using dive tables represents a basic diving skill.
Prospective spearfishermen need to know the dive tables thoroughly. They particularly need confidence in planning no decompression stop repetitive dives. They need to conservatively adhere to planned depth and bottom time limits during each dive. Dive computers provide an alternate method for planning repetitive dives. Many scuba spearfishermen use computers.