Uneven port/starboard boat speed

[Itsabimmerthing]

On j105s with a similar setup they see the same tack to tack differences. The tack where the knotmeter is on the low side is always the faster tack.

Could you share the numbers? Would be interesting to know how much heel correction is needed on 105.

 

[Frogman56]

Note that the effect will vary depending on the sensor position, which can vary boat to boat. But the calibration method more or less seems to work.

But heel angle does bring the sensor closer to the free surface as well, common across the fleet unless you have two sensors, which are now a common retrofit.