Today we will discuss compass, one of the most ancient tools used by our ancestors to help them find their way. this invention is attributed to the Chinese and the Vikings. They discovered that the Earth's magnetic field was used as a form of entertainment: the arrows were thrown randomly magnetized, and this "magic" were aligned to the north, impressing the audience. This principle is what is used in the bushings that allow you to identify the direction of magnetic north, and in our case, the other directions of the compass, making it possible to control the angle of the bow of the ship. This is done through the use of its components:
sensing element : Formed by a group (n even) of magnetized needles and free to move, which are arranged along the NS direction;
Wind Rose : solidarity with the sensing element and graduated with a NS direction coincident one identified by the needles;
line faith: that identifies the direction of the ship bow.
The sleeves can be in liquid or dry, the most used are liquid, formed from 30% to 70% pure alcohol and distilled water. The liquid is designed to lighten the pink and to curb the rotations, making it faster to read. Alcohol, however, serves to bring down the point freezing of the liquid, whose expansions are absorbed by a special membrane.
compass, so conceived, is used to control the corners of the route (fixed lubber line to indicate the bow) and is called the steering compass or government.
Photo at the side there is an illustration of how a compass is made and the names of all its components: the mortar, container mounted on gimbals, which absorb impact, thanks to these suspensions mortar remains horizontal despite pitching and rolling of the ship. Also mounted on the mortar is the line of faith, always in solidarity with the ship to indicate the bow. Now that we know how it is made and a compass that indicates what we do as our ancestors and make use of it to help you find your way.
Fair winds to all!
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