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The original needle chamber of Suunto M-311 on the left with filling hole visible. On the right: newer design. On 10 April 1933 Tuomas Vohlonen applied for a patent for a liquid compass, with the description "liquid compass with compass needle and liquid entirely sealed in a container made of celluloid".
[10] By the late 1960s many foresters had begun using more modern liquid-damped compass designs, including mirror-sight protractor models such as the Silva Type 15 Ranger or the Suunto MC-1 (later, the MC-2). These compasses were fast to use, particularly along straight cruise lines and were sufficiently accurate for most forestry applications ...
As of 2008, JWA (now known as Johnson Outdoors, Inc.) was sourcing most of its Silva brand compasses from PT Uwatec Batam, an Indonesia-based wholly owned subsidiary of Johnson Outdoors, Inc. [3] The discontinued Silva 424 Wrist Sighting Compass was made for Johnson Outdoors by Suunto Oy of Finland, while the Silva Lensatic 360 compass is made ...
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.
Compass turns (turns using the magnetic compass as the primary reference instrument) are not standard practice in modern aircraft. Compass turns are typically performed in simulated or actual failures of the directional gyro or other navigational instruments. A magnetic compass is a simple instrument when the compass is not moving and is on the ...
Two segments within New Hampshire totaling 6.0 miles (9.7 km) in NH. Unrelated to NH 113. NH 113B is a loop of SR 113 NH 114: 60.433: 97.257 NH 101 in Bedford: NH 10 in Grantham: 1931: current NH 115: 9.697: 15.606 US 3 in Carroll: US 2 in Jefferson — — NH 116: 48.605: 78.222 NH 10 in Haverhill: US 2 in Jefferson — — NH 117: 8.095: 13 ...
32-point compass rose. The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography.A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each separated by 90 degrees, and secondarily divided by four ordinal (intercardinal) directions—northeast, southeast, southwest, and ...
A compass rose, showing absolute bearings in degrees. In nautical navigation the absolute bearing is the clockwise angle between north and an object observed from the vessel. If the north used as reference is the true geographical north then the bearing is a true bearing whereas if the reference used is magnetic north then the bearing is a ...