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A submarine tracking another submarine can take advantage of its target's baffles to follow at a close distance without being detected. Periodically, a submarine will perform a maneuver called clearing the baffles, in which the boat will turn left or right far enough to listen with the forward array sonar for a few minutes in the area that was previously blocked by the baffles.
A crash dive is a maneuver by a submarine in which the vessel submerges as quickly as possible to avoid attack. Crash diving from the surface to avoid attack has been largely rendered obsolete with the advent of nuclear-powered submarines, as they normally operate submerged. However, the crash dive is also a standard maneuver to avoid a collision.
An emergency main ballast tank blow is a procedure used aboard a submarine that forces high-pressure air into its main ballast tanks. The high-pressure air forces ballast water from the tanks, quickly lightening the ship so it can rapidly rise to the surface.
As the high-speed maneuvers finished at 13:30, Waddle called for Greeneville to perform an emergency dive (called an "emergency deep") followed by an emergency main ballast blow, a maneuver that brings the submarine from a depth of about 400 feet (120 m) to the surface in a few seconds by using high-pressure air to force the water out of the ...
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It was also used by U.S. Navy nuclear submarines to clear their sonar dead zones. [5] The Williamson turn is the most preferred maneuver by navigating officers onboard ship as it can be used in any condition of visibility and weather. The suitability of the turn depends on the situation:
A briefed maneuver to low aspect (where aspect refers to target position—regardless of distance—relative to the friendly aircraft's nose; "high aspect" would be on an azimuth in front of the friendly, while "low aspect" would indicate position along an azimuth behind the friendly) to stop closure on the threat or geographical boundary, with ...
Submarine escape trunk View inside a submarine escape trunk, looking up from below the lower hatch. An escape trunk is a small compartment on a submarine which provides a means for crew to escape from a downed submarine; it operates on a principle similar to an airlock, in that it allows the transfer of persons or objects between two areas of different pressure.