2007-02-20 05:08:16 · 8 answers · asked by fuzzy_62_37 1 in Cars & Transportation ➔ Boats & Boating
Are you calibrating an electronic compass?
Or are you asking how to swing a magnetic onboard compass in order to work up a deviation card or graph?
Either way, keeping the boat tied to a dock is NOT the correct thing to do.
I can tell you exactly the steps to take to do for either, but your question needs to be a little more specific.
Feel free to email me at admin@sailingunlimited.net
Best regards,
Geoff
www.sailingunlimited.net
2007-02-20 05:37:41 · answer #1 · answered by Geoff 3 · 0⤊ 0⤋
There are people that will calibrate your compass for you. It is fairly inexpensive and it is more accurate than if you do it yourself. There are small adjustment screws on the sides of the compass for the two axis, get a GPS or a local chart and adjust the screws to the chart, but it is not an easy task to do yourself and get it spot on.
2007-02-21 18:07:50 · answer #2 · answered by Dan 5 · 0⤊ 0⤋
get a recent edition of the local chart; figure out from it the local variation.
Go out and run a number of different courses, covering as many directions from north to east to south to west as you can;
run these courses between easily identifiable points......end of dock to middle of rock, buoy to buoy, top of hill ahead to middle of hill behind........do this with that new fangled GPS running; write down what the compass says, what the GPS says, and then measure off on the chart what the actual direction was; this will give you a table or graph of what corrections you need to apply for various courses in various directions...... maybe say 5 degrees when running 045, maybe nothing when running 135
Compass >Deviation>Magnetic>Variation>True; or Compass course adjusted for Deviation ( what happens on the boat ) gives Magnetic, which adjusted for Variation gives True
2007-02-21 00:13:08 · answer #3 · answered by yankee_sailor 7 · 1⤊ 0⤋
Do you have a deviation card? Are you asking the thank you to artwork out the deviation on your boat? Are you asking the thank you to artwork out version? Are you requesting a numonic to help you keep in mind no remember in case you upload or subtract version and deviation? Are you asking once you are able to prepare those? Your question could nicely be interpreted in such somewhat some methods in this undertaking that i'm a loss to respond to you. I even have each and every of the understanding that it quite is attainable to have in this undertaking, yet i don't % to take a seat right here writing for 0.5 an hour to supply it to you and then locate which you already knew 0.5 of it. Please upload some extra pointers on your question and that i visit be thrilled to respond to you! Sue x
2016-12-17 14:40:52 · answer #4 · answered by bornhoft 4 · 0⤊ 0⤋
What kind of boat are you using? Steel, aluminum, and FRP affect a boat's magnetic field different. You need to create a deviation card by running a know magnetic course at various angles. You will need an up-to-date chart showing most current magnetic variation for your area.
2007-02-20 16:27:40 · answer #5 · answered by Richard B 4 · 0⤊ 0⤋
Chapmans, Duttons, and Bowditch all have a step by step explanation on swinging a compass
2007-02-21 03:28:41 · answer #6 · answered by T C 3 · 0⤊ 0⤋
What compass?
Hand held?
Fluxgate toroidal electronic?
Binnacle compass?
Other steering compass?
Calibrating or swinging?
2007-02-20 13:37:37 · answer #7 · answered by Donno 1 · 0⤊ 0⤋
Do it at the dock to assure that you are sttionary. Use the GPS to get direction. Do it again out on the water, later, with GPS.
2007-02-20 05:22:56 · answer #8 · answered by science teacher 7 · 0⤊ 1⤋