Arbalest skilled arbalestier (arbalester) could loose two bolts per minute. The term "arbalest" is sometimes used interchangeably with "crossbow". "Arbalest" is a Medieval French word originating from the Roman name ' (from ' 'bow' + " 'missile-throwing engine'), which was then used for crossbows, although originally used for types of artillery. Modern French uses the word ", which is linguistically one step further from the stem (disappearance of the "s" phoneme in the last syllable, before "t"). The word applies to both crossbow and arbalest (the latter may be referred to as a "heavy crossbow", but an actual heavy crossbow may
Weapon systems officer Weapon systems officer A Weapon Systems Officer ("WSO", or "wizzo” as a common nickname ) is an air flight officer directly involved in all air operations and weapon systems of a military aircraft. Historically, aircrew duties in military aircraft were highly specialised and rigid, because the relevant controls, instruments/displays, and/or weapons were concentrated in front of particular seats, panels or positions. That included two-seat variants of fighter or attack/strike aircraft (including late 20th century types such as the F-4 Phantom II, A-6 Intruder, F-111, Panavia Tornado, Su-24 Fencer and Su-30MK Flanker-C). However, more recently developed aircraft with two-member crews such