Raymarine T210 User Manual page 14

Maxi Display
Drift and Set
obstruction or headland.
Your Maxi Display automatically calculates this information using
information from your GPS, boat speed and compass. The calculated
set angle is rounded to the nearest ten degrees.
Note: Set and Drift as calculated includes the effect of both tide and
leeway. Therefore the value will be different on opposite tacks, depending
on whether the boat is sailing into or against the tide. This will be
especially noticeable when the tidal effect is small.
Warning: In conditions of little tide, this calculation is very sensitive to
inaccuracies in the calibration of your speed and compass transducers.
It is not recommended that you rely on the accuracy of this calculation in
situations where the tide speed is less than one Knot.
Note: A flashing indicator will alert you if the calculated values are
uncertain.
See Sea Trial and Calibration on page 24 for information on how to
maximise the accuracy of the calibration of your speed and heading
transducers.
12
Because the boat is not always moving directly in the
direction of its compass heading you need to know the
direction (SET) and the speed (DRIFT) by which the boat is
being pushed off course. Tactically this is important when
assessing when to tack or gybe to round a mark or clear an
www.tacktick.com