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Chapter 4: Calibration

Depth offsets

WARNING:

The use of incorrect offset values could result in misleading depth

information being displayed with a consequent risk of running

aground.

The depth offset screen enables you to determine the exact point on the

vessel from which depths are measured. This point can be:

• The transducer. Set offset to zero. With zero offset applied, the

screen header is OFST.

• The bottom of the keel. Set a negative offset equal to the vertical

distance between the transducer position and the bottom of the keel.

With a negative offset applied, the screen header is KEEL.

• The water line. Set a positive offset equal to the vertical distance

between the transducer position and the water line. With a positive

offset applied, the screen header is W/L.

4.3 Intermediate calibration

Intermediate calibration enables you to:

• Check the instrument software version.

• Check and if necessary set, the instrument status - either MASTR

(master) or REPTR (repeater), for both speed and depth.

Follow the procedure in the Intermediate calibration flow diagram.

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Raymarine ST40 Especificações Página 40