Underwater searches
TECHNIQUES FOR FINDING UNDERWATER TARGETS
Circular search; Jackstay search; Spiral box search; Compass grid search; Diver searches; Pendulum search; Compass search; Directed search; Snag-line search
Underwater searches are procedures to find a known or suspected target object or objects in a specified search area under water. They may be carried out underwater by divers, manned submersibles, remotely operated underwater vehicles, or autonomous underwater vehicles, or from the surface by other agents, including surface vessels, aircraft and cadaver dogs.