oryx_and_crake | Вопрос

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“One of those down there has got calipers carved on it,” said Pilu cheerfully. “The trousermen use calipers to measure distance on their charts.”

Все словари дают перевод "штангенциркуль". Но мне смутно представляется, что расстояния на картах измеряют другой штукой, вроде циркуля, но вместо карандаша у нее еще одна иголка. И вроде бы мы в розовом детстве именовали такую штуку "измерителем". Я права или нет?

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A divider caliper is also used to measure a distance between two points on a map. The two caliper's ends are brought to the two points whose distance is being measured. The caliper's opening is then either measured on a separate ruler and then converted to the actual distance, or it is measured directly on a scale drawn on the map. On a nautical chart the distance is often measured on the latitude scale appearing on the sides of the map: one minute of arc of latitude is approximately one nautical mile or 1852 metres.

Source - http://www.blogomonster.com/blogs/entry/Caliper

Also, http://en.wikipedia.org/wiki/Caliper