Chapter 1: Preparing for Installation 6-1-13
ST290 Instrument System Owner’s Handbook
Figure 1-8: Speed & Depth Transducer siting
Each transducer should also:
• Be ahead of the propellers by at least 10% of the water line length.
• Be at least 6 in (150 mm) 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 enable the nut to be fitted.
• Have 4 in (100 mm) of space above it, 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.
Figure 1-9: Depth Transducer maximum angle
Sailing vessel Planing power vessel Displacement power vessel
D5514-1
D4350-4
81183_2 S6.book Page 13 Wednesday, May 7, 2003 11:27 AM
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