Stabilogye

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The Stabilogauge was an analog on-board computer for calculating stability , which was mainly used on American naval vessels .

description

Stabilog eye of the steamship Jamaica with the ship's name engraved and micrometer screws on the side

The name can be interpreted as a combination of words from stability and gauge , where gauge is an English technical term for a simple measuring device. During the Second World War , the Stabilogauge, which was developed from a fire control computer by the American Hydromath Company , was standard equipment for all ships ordered by the US government. The constant ship-typical data required to determine the stability were entered in the form of electrical resistors and capacitors . Therefore, each ship had its own stabilog eye, and the ship's name was engraved on the stability calculator.

The variable data that are important for the stability of the ship, such as cargo , ballast and fuel , were entered into the device by the cargo officer for the individual rooms and tanks using lateral micrometer screws. Corrections were also made for free liquid surfaces, charge density and trim .

The picture example shows the stabilog eye of Jamaica . She was built as the C3 merchant ship Jamaica at Seattle-Tacoma Shipbuilding, Tacoma, Washington , and commissioned as the Bogue-class escort aircraft carrier USS Jamaica (CVE-43) . It was given to Great Britain in September 1942 and was then called HMS Shah . In 1947 she was converted into a merchant ship, renamed Salta and scrapped in 1966.

literature

  • Per Jensen: “Helmsman determining stability” - analog on-board computer for determining stability and strength . In: Gudrun Wolfschmidt (Hrsg.): Vom Abakus zum Computer, book accompanying the exhibition “History of Computing Technology”, 2015–2018 (= Nuncius Hamburgensis - Contributions to the History of Natural Sciences . Vol. 21). tredition, Hamburg 2017 ISBN 978-3-7439-0520-7 , pp. 97-100.
  • Joseph Krauss, Martin Berger, Walter Helmers (eds.): Müller-Krauss - Handbook for Ship Control - Volume Two: Shipping Law, Cargo, Seamanship, Stability, Signaling and Radio Systems and other areas . 6th, revised edition, reprint. Springer, Berlin, Heidelberg 1962, ISBN 978-3-662-27144-5 , p. 365.
  • Stabilogauge stability computer, American President Lines C6-S-1qc master mariner. Instruction book. American Hydromath Company; American President Lines, Ltd., 1974

Web links

Individual evidence

  1. ↑ Marine Engineering / log . tape 70 . Simmons Boardman Publishing Company, New York 1965, p. 127 ( online ).
  2. ↑ a b W. Michael Walsh, United States. Maritime Administration: Trim and Stability Guide for Container and Barge Carrying Ships . US Government Printing Office, Washington 1972, p. 95 and 96 ( digitized version ).