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Trekphiler (talk | contribs) Undid revision 790269042 by DulcetTone (talk) read the whole sentence; there's a reason it's parenthetical |
→History: amplified nomenclature of the banjo and is-was which are often misidentifed |
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During [[World War I]], computing a target intercept course for a torpedo was a manual process where the fire control party was aided by various [[slide rule]]s<ref name=fleetsub>{{cite web | title = Torpedo Data Computer | work = FleetSubmarine.com | year = 2002 | url = http://www.maritime.org/tdc.htm | accessdate = 2006-07-03 }}
</ref> (the U.S. examples were the [[Mark VIII Angle Solver]] (colloquially called the "banjo", for its shape), and the "Is/Was" circular sliderule ([[Nasmith Director]]), for predicting where a target will be based on where it is now and was)<ref>Holwitt, Joel I. ''"Execute Against Japan"'', Ph.D. dissertation, Ohio State University, 2005, p.147; Beach, Edward L., Jr. ''Run Silent, Run Deep''.</ref> or mechanical calculator/sights.<ref name = dread>{{cite web |title = Firing a Torpedo Using A Mechanical Computing Sight |work=The Dreadnought Project |url =http://www.dreadnoughtproject.org/tfs/index.php/Torpedo_Director|year=2000
|accessdate=2006-07-11}}</ref> These were often "woefully inaccurate",<ref>Holwitt, p. 147.</ref> which helps explain why torpedo spreads were advised.
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