NorthStar Navigation 491 - Manual (Page 11)

SECTION TWO — Installing the transducer
491 INSTALLATION MANUAL Revision A PAGE 7
FIGURE 1: Recommended installation locations for a transducer
Installing the
transducer
A flat-bottom hull provides the best environment for mounting the trans-
ducer: It provides a horizontal surface and a constant water flow over the
transducer, with little turbulence (see Figure 2 for the recommended
transducer incline angle). If the vessel has a deadrise angle greater than 5
degrees, mount the transducer on a fairing block to create a horizontal
surface and keep the transducer perpendicular to the waterline (see
Figure 3). You must order the fairing block, if needed, from the trans-
ducer’s manufacturer.
inboard
pressure waves
1/3 aft
full keel sailboat
displacement hull
(6-12")
fin keel sailboat
150-300mm
LWL
Best location for the transducer
(Load Waterline Length)
step-hull
outboard and I/O
planning hulls