Types Of Magnetic Compass Used On Board Ship

Inspiration Types Of Magnetic Compass Used On Board Ship, All four types determine direction but each has special features that are specific for particular.

Types of magnetic compass used on board ship. Is a marine surveying company based in hong kong who carry out magnetic compass adjustments on vessels of all types and sizes. The use of the magnetic compass can be traced back as far as 4th century bc china where a type of magnetite known as lodestone was used as a tool in a type of divining magic known as geomancy. The chinese mastered the use of magnetic iron for navigation by the beginning of the 12th century and its use quickly spread to europe and beyond. Principal surveyor john hall holds an unlimited marine compass adjusters licence and has adjusted compasses on many hundreds of seagoing ships and boats of all types and sizes.

He has installed new compasses on offshore cargo vessels fishing trawlers. Detailed explanation about ships magnetism. Fixed dial floating dial orienteering and cruiser. A magnetic compass is a navigation device used to find the northern direction with the help of the earths magnetic field.

Four basic types of magnetic compasses exist. The ships magnetic compass the principle of the present day magnetic compass is in no way different from that of the compass used by the ancients. The compass has a diagram on it that has the four direction that is north east west and south marked on it. It consists of a magnetised needle or array of needles pivoted so that rotation is in a horizontal plane.

The hood should always be in place except when the compass is being used cover it again after use. Magnetic compass is the most important of all instruments aboard even the most modern vessel and it is probably the most reliable. Magnetic compasses are the most commonly used type of compasses. The superiority of the present day ships compass results from.

Its origins go back as long ago as 2300 bc but the chinese development of the compass card dates to the 14 th century and the sophisticated instrument we know today became stabilized with the advent of steel ships in the 19 th century. The magnetic compass can be used either stand alone or in combination with any of the gyrocompass systems. In other words the compass needle on board does not lie on the magnetic meridian but is deflected on one side or the other because of the ships magnetism. A ship is made of steel acquires a certain magnetism and so inherently has an effect on the magnetic compass.

All magnetic material electric wires etc should be kept as far as any from the compass as possible.