Upkeep
Upkeep may refer to: * Maintenance, repair, and operations * Upkeep bomb, a bouncing bomb developed in World War II for Operation Chastise Operation Chastise, commonly known as the Dambusters Raid, was an attack on Nazi Germany, German dams carried out on the night of 16/17 May 1943 by No. 617 Squadron RAF, 617 Squadron RAF Bomber Command, later called the Dam Busters, using spe ...

Bouncing Bomb
A bouncing bomb is a bomb designed to bounce to a target across water in a calculated manner to avoid obstacles such as torpedo nets, and to allow both the bomb's speed on arrival at the target and the timing of its detonation to be predetermined, in a similar fashion to a regular naval depth charge. The inventor of the first such bomb was the British engineer Barnes Wallis, whose "Upkeep" bouncing bomb was used in the Royal Air Force, RAF's Operation Chastise of May 1943 to bounce into German dams and explode underwater, with an effect similar to the underground detonation of the later Grand Slam bomb, Grand Slam and Tallboy bomb, Tallboy earthquake bombs, both of which he also invented. British bouncing bombs After the outbreak of the Second World War in 1939, Wallis saw strategic bombing as the means to destroy the enemy's ability to wage war and he wrote a paper entitled "A Note on a Method of Attacking the Axis powers, Axis Powers". Referring to the enemy's power suppli ...
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Maintenance, Repair, And Operations
The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure and supporting utilities in industrial, business, and residential installations. Terms such as "predictive" or "planned" maintenance describe various cost-effective practices aimed at keeping equipment operational; these activities occur either before or after a potential failure. Definitions Maintenance functions can be defined as maintenance, repair and overhaul (MRO), and MRO is also used for maintenance, repair and operations. Over time, the terminology of maintenance and MRO has begun to become standardized. The United States Department of Defense uses the following definitions:Federal Standard 1037C and from MIL-STD-188 and from the Department of Defense Dictionary of Military and Associated Terms * Any activity—such as tests, measurements, replacements, adjustments, and repairs—intended to retain or r ...
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