Rebalancing the compass for the opposite hemisphere involves dismantling the compass and moving the weight to the opposite side of the card and is not usually considered economically viable or indeed practicable. Easy to read, especially when you are fatigued, and far more stable in turbulance. Under the Magnetic heading write twelve numbers, starting at degrees and proceeding around the compass in 30 degree increments, thus , , , , , etc Just follow the instructions below. The method outlined above will produce better results in a fraction of the time! During your review of the compass you might find on one heading there is more than a ten degree heading error which might be cause for alarm.
Vertical card compass - large dynamic errors?
Complete a full swing noting the magnetic heading against the compass heading. Compass installation on the Monkey Island on vessel's centre line. Large discrepancies between actual deviation and that "predicted" by the adjuster, sometimes as much as 30 degrees, have been observed on compasses which have been "expertly adjusted" alongside. The green lines indicates zero variation. This design uses eddy current damping to minimize lead and lag during turns.
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Please enter the letters from the image below: Some cargoes can affect the compass more than others. The placard must indicate the specific electronic equipment operating when the error was noted. The regulation says the placard must state which electrical loads, or combination of loads, would cause a deviation of more than 10 degrees when turned on. If there is any inconsistency of the compass as this rotation takes place, it is noted as variable deviation of the compass, likely caused by electromagnetism or reaction to turning of shipboard metal. It happened to my coworker recently.
Just need a large empty ramp. My avionics in the Cessna used to swing the compass about 4 degrees. Choosing the correct mount and calibration are the only snags. Jay Anderson , NT. Then there are the electrical lines for the taxiway lights along with the counterpoise lines and com lines and the steel storm lines that parallel and cross the taxiway I have used vertical card on the last two airplanes I have owned. Swinging them can be a greater challenge than the old whiskey compass.