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2. Silva compass - Wikipedia

   en.wikipedia.org/wiki/Silva_compass

   Silva Sweden AB is an outdoors products company that sells handheld compasses and other navigational equipment including GPS tools, mapping software, aircraft altimeters, and marine navigation tools. Silva's founders - Gunnar Tillander, Alvar Kjellström, Arvid Kjellström, and Björn Kjellström - invented the hugely popular orienteering ...

3. Hand compass - Wikipedia

   en.wikipedia.org/wiki/Hand_compass

   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.

4. Pelorus (instrument) - Wikipedia

   en.wikipedia.org/wiki/Pelorus_(instrument)

   In marine navigation, a pelorus is a reference tool for maintaining bearing of a vessel at sea. It is a "simplified compass" without a directive element, suitably mounted and provided with vanes to permit observation of relative bearings. [1] The instrument was named for one Pelorus, said to have been the pilot for Hannibal, circa 203 BC.

5. Johnson Outdoors - Wikipedia

   en.wikipedia.org/wiki/Johnson_Outdoors

   From 1980, JWA imported Swedish-made compasses manufactured by Silva Production AB (Silva Group) for sale in North America. In 1996, a decision by Silva Production AB of the Silva Group parent to begin marketing its Swedish-made Silva brand compasses via a new distribution network in North America with Brunton, Inc. led to litigation the following year between JWA, which owned the North ...

6. Navigational instrument - Wikipedia

   en.wikipedia.org/wiki/Navigational_instrument

   Marine chronometer used to determine time at the prime meridian with great precision which is necessary when reducing sights in celestial navigation. Nocturnal used to determine apparent local time by viewing the Polaris and its surrounding stars.

7. Bearing compass - Wikipedia

   en.wikipedia.org/wiki/Bearing_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). (Bearing: angle formed by the north and the visual to a certain object in the sea or ashore).