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ST30 Speed Operation and Installation Handbook
2.4 Installation
All speed transducers are supplied with detailed installation and mainte-
nance instructions. These instructions, together with the following notes,
should be read thoroughly before attempting to install the transducer.
Speed transducer (through hull)
For accurate speed readings, locate the speed transducer in the shaded
'clear flow' areas as shown.
D587
The transducer should also be:
• ahead of propellers (10% W.L. length minimum)
• at least 150mm (6in) from the keel (with sailing yachts siting should be
forward of the keel).
• near the centreline of the vessel
• clear of other through hull fittings or projections
• have sufficient clearance inside the hull to allow the nut to be fitted
• have 100mm (4in) clearance above the through hull fitting for with-
drawal
