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A keel boat typically sails 7 degrees closer to the wind when the wind speed goes from light to moderate. You must take this into account when you are tacking on wind shifts.
A keel boat typically sails 7 degrees closer to the wind when the wind speed goes from light to moderate. You must take this into account when you are tacking on wind shifts.
The Automatic compensation for the decreasing angle between tacks with increasing wind speed works for boats that have a different heel in light and moderate wind. Typically keel boats, possibly multihulls. Also applicable to dinghies if they are e.g. heeled more in light wind than in moderate wind.
The Automatic compensation for the decreasing angle between tacks with increasing wind speed works for boats that have a different heel in light and moderate wind. Typically keel boats, possibly multihulls. Also applicable to dinghies if they are e.g. heeled more in light wind than in moderate wind.
The electronic compasses don't have this facility!
The electronic compasses don't have this facility!
The size of the compensation is selectable. A typical automatic compensation is 7 degrees. So, as it is automatic - you have more brain power and time for all the other things that leads to victory. And you will not apply the compensation the wrong way when overloaded with other urgent tasks.
When wind speed increases most boats sail closer to the wind and the reading of an ordinary compass changes without a change in the direction of the wind. Some Ansar compasses automatically compensates for this. If the compass indicates e. g. Best Lift in light wind it will still indicate Best Lift if the wind gets moderate.
Most sailing boats sail with an angle between tacks of some 90 degrees in light winds. When the wind is moderate this angle typically decreases to between 70 and 80 degrees, depending on the type of boat.
In keelboats (generally boats whose heel increases with wind strength) these compasses automatically compensates for this change of angle between tack with wind strength.
The indication of best lift, zero lift and worst header is correct, within a couple of degrees, even as the boat's angle between tacks decreases as the strength of the wind increases.
If you sail with a compass without compensation (all other compasses as far as I know) it will show you a sizable header of some 7 degrees when the only thing which has happened is that you are sailing in a lull in an otherwise moderate wind.
Tacking on these "headers" will only make you loose compared to your competitors.
In order to compensate for this manually you have to subtract or add (depending on tack) some 7 degrees to the reading of the compass.
The automatic compensation of the Ansar compasses works for an angle of around 90 degrees in light wind (typical for most boats) to a selected angle between tacks, typically some 75 degrees, as the boat is heeled (moderate wind).
The angles 90 to 75 degrees in moderate winds suits most boats. If you require other angles please let me know. It can probably be arranged.
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Modified Jan. 2018.
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