Swinging a compass with a gps


Join Date Nov Posts Assuming you can steer a clean course and the GPS's averaging function is controlable, have it average course over as long a time as possible to reduce position bounce and then steer straight for some minutes comparing the ship's compass with the GPS on magnetic. The same can be achieved for a bulkhead compass by using a pelorus and comparing the readings. On certain vessels, such as aircraft carriers, some fishing vessels and some modern container ships with a narrow superstructure section, the compass is offset, and this can create interesting challenges for compass adjusters. The GPS enables us to measure our drift, but one measurement cannot give us two numbers. If you aim the bow toward a mark, the boat won't be heading toward that mark. Knowing the range's true bearing and the local variation, he can calculate the compass's deviation.
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Before doing all this make sure there is no ironmongery near the main compass, and after doing it turn to the position with the worst deviation then either switch the engine on if its been off or vice versa. Magnets are aligned fore and aft and athwartships to create horizontal magnetic fields to compensate for the permanent horizontal components of the ship's magneti sm. This made life very easy, but few airfields have a compass-swinging area now. A correctly installed and adjusted magnetic compass, of a size and type suitable for the vessel, fulfills this requirement. Take it slow, read these instructions carefully from start to finish, and the task is very managable. Another issue is parallax.
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Fastest easiest accuarate way to adjust swing a compass Compass Rose

The WAC or VNC for your area will tell you what the magnetic variation is, since both have the lines of magnetic variation shown look for them! The magnetic disturbance in the airplane is to the right of the compass so the compass has a clockwise error. Magnetic compasses, as you all perhaps know, require some corrections, the principal ones of which are Variation and Deviation. An advantage of swinging the compass this way is that the boat can be "parked" steady on each of the required headings whilst adjustments are made. Align the base with the nose pointing where your trike compass indicates North is.
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Swinging a compass with a gps
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Swinging a compass with a gps
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THE FASTEST, EASIEST AND MOST ACCURATE WAY TO ADJUST A COMPASS

Swinging a compass with a gps



Description: Unlike Variation, Deviation is constant because it is from local magnetic fields in your aircraft GNSS signals are vulnerable to loss and error, both intentional and unintentional. Jack What part of the world are you in? The resulting parallax angle is 4 degrees.

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