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There are more than just a few keychain compass nautical decorations available at online retailers. Even with GPS’s recent dominance in navigational technology, the keychain compass is still as valued by nautical decor collectors and adventurers alike. This can be attributed to the fact that the compass bears no technological weakness from low batteries or lost satellite signals. Because of the GPS’s many constraining technologies, it is completely unreliable to serve as the sole navigational instrument on a long journey. Different situations call for different compasses, and there are quite a few variations to help out when facing different obstacles that are often encountered during travel. The “closed face” keychain compass is a variation of the regular compass. This type of compass operates just as the name implies. This type of compass is fitted with a hinge that lets it open and shut, and protect its mechanical insudes. These compasses do not need a hinge, and can be fitted with a lid that comes completely off of the compass. World War II was the era that was known for producing the closed face compass, so finding an authentic model from that era may run a hefty price. Just as there is a closed face compass, there is also an open face compass. Exactly like the name suggests, the open face compass has its face exposed thanks to no outer lid for protection. Because of this open face, this keychain compass is great for quickly glancing down at it without fumbling with the lid. Another type of keychain compass is the prismatic compass - a compass with a prism. The protective case of the prismatic compass includes an easily read scale for identifying one’s bearing. The prism of the prismatic compass is normally located at the bottom of the compass. The U.K. military in particular was known to use prismatic compasses. Another type of keychain compass is the lensatic compass, which contains at least one lens. The lens, or lenses, of the lensatic compass are necessary for reading the scale of this type of keychain compass. The U.S. military has employed the use of the lensatic compass for over 100 years. The transit compass is loaded with a front and rear transit sight. Not unlike the prismatic compass, the transit compass often has a rear sight made up of a singular prism. Also, the transit compass operates in similar fashion to the lensatic compass due to its included front sight. This makes the prismatic and lensatic compasses a kind of sub category of the transit compass family. One of the more simplistically designed keychain compasses is the base plate compass. The design of the base plate compass is totally transparent. Because of this transparency, the base plate is a practical compass for map reading. These beach house decor compasses are just a few of the many types that you can find. Certain conditions call for certain compasses. Many hikers use what are known as “accessory compasses”, such as knives with built in compasses. Compasses with included mirrors, clinometers, and/or magnifiers are very good for map reading. Magnifiers on the compass are essential for reading finely detailed map points, mirrors accurately read distant land markings, and clinometers measure inclination accurately.
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