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Floating-card compass with prismatic sight (bearing 220° through eyepiece). The marine hand compass, or hand bearing compass|hand-bearing compass as it is termed in nautical use, has been used by small-boat or inshore sailors since at least the 1920s to keep a running course or to record precise bearings to landmarks on shore in order to determine position via the resection technique.
Thumb compasses are also often transparent so that an orienteer can hold a map in the hand with the compass and see the map through the compass. Thumb compasses attach to one's thumb using a small elastic band. The first commercially successful orienteering thumb compass was the Norcompass, introduced by Suunto in 1983. [1]
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 February 2024. Finnish manufacturer of compasses, dive computers and sports watches Suunto Oy Suunto's headquarters and production facilities in Vantaa, Finland Company type Subsidiary Industry Measuring instruments Founded 1936 ; 89 years ago (1936) Founder Tuomas Vohlonen Headquarters Vantaa ...
Nav finder and underwater compass – basic underwater navigation tools Suunto SK-7 diving compass in aftermarket wrist mount with bungee straps. Diver navigation, termed "underwater navigation" by scuba divers, [1] is a set of techniques—including observing natural features, the use of a compass, and surface observations—that divers use to navigate underwater.
Dial of a Suunto compass SUUNTO dial compass. A bearing compass, is a nautical instrument used to determine the bearing of observed objects. (Bearing: angle formed by the north and the visual to a certain object in the sea or ashore).
A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.
A standard Brunton Geo, a combined compass and inclinometer, popular as a cave surveying compass until recently. The most common device used by cave surveyors is a sighting compass, such as that manufactured by Suunto or Silva, that can be read to the half-degree. Compasses used for cave surveying have to be rugged to cope with the harsh ...
TVMDC,AW is a mnemonic for converting from true heading, to magnetic and compass headings. TVMDC is a mnemonic initialism for true heading, variation, magnetic heading, deviation, compass heading, add westerly. The most common use of the TVMDC method is deriving compass courses during nautical navigation from maps.