Raymarine ST40 User Manual download pdf (Page 23)

14 ST40 Depth Instrument Owner’s Handbook

The transducer should be sited within the clear water flow areas

indicated by the shaded areas in the following illustration.

Sailing vessel

Planing power

vessel

Displacement power

vessel

Transducer siting

D4349-1

The transducer should also:

• Be ahead of the propellers (by a minimum of 10% of the water line

length ).

• Be at least 150 mm (6 in) away from the keel (ideally ahead of the

keel if a sailing yacht).

• Be as near as possible to the centre line of the vessel.

• Be clear of other through-hull fittings or projections.

• Have sufficient clearance inside the hull to fit the nut.

• Have 100 mm (4 in) of headroom to allow for withdrawal.

In addition to the above requirements, the depth transducer must be

mounted within 10

of the vertical, forward, aft and athwart ships.

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Raymarine ST40 User Manual Page 23