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Flank speed is an American nautical term referring to a ship's true maximum speed but it is not equivalent to the term full speed ahead.Usually, flank speed is reserved for situations in which a ship finds itself in imminent danger, such as coming under attack by aircraft.
Figure 1: Photo of World War II US Navy submarine pitometer. This unit uses a mercury-based manometer to measure the difference in static and dynamic water pressure. Pitometer logs (also known as pit logs) are devices used to measure a ship's speed relative to the water. They are used on both surface ships and submarines.
Diagram of a chip log attached to a log-line and reel on a ship. A chip log, also called common log, [1] ship log, or just log, is a navigation tool mariners use to estimate the speed of a vessel through water.
The engineers hear the bell and move their handle to the same position to signal their acknowledgment of the order, and adjust the engine speed accordingly. Such an order is called a "bell"; for example, the order for a ship's maximum speed, flank speed, is called a "flank bell". [2]
USS LSM(R)-190 was a United States Navy LSM(R)-188-class Landing Ship Medium (Rocket). She was built at Charleston Navy Yard, Charleston, South Carolina and was commissioned on 21 November 1944. LSM(R)-190 took part in the Battle of Okinawa from 7 April–4 May 1945. She was hit and sunk by a Japanese suicide plane on 4 May 1945 while on the ...
The Navy has been aware of the current ramp's limitations and is developing one for use in up to sea states 3–4. When deploying a SEAL Delivery Vehicle (SDV), the EPF's stern-mounted crane could launch it in up to sea state 3 conditions, but support surface craft were needed to get divers into the underwater vehicle, which could only be ...
USS Doyle (FFG-39) was the 30th ship to be constructed in the Oliver Hazard Perry class of guided missile frigates of the United States Navy. Doyle was named after Vice Admiral James Henry Doyle (1897–1982). Vice Admiral Doyle was most known for his contributions during the Korean War as Commander Amphibious Group One. The ship was in service ...
This ship has a flank speed of 50 knots (93 km/h; 58 mph) but can travel only 1,500 nautical miles (2,800 km; 1,700 mi) at flank speed, exhausting its fuel in 30 hours. Thus, its "flank speed" consumes fuel over seven times faster than the most economic speed.