Furuno BBDS1 Operator's Manual page 18

Bottom discrimination sounder
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1. MOUNTING
Mounting location
To ensure the best performance, the sensor must be submerged in aeration-free and turbulence-
free water. Mount the sensor close to the centerline of the boat. On slower heavier displacement
hulls, positioning it farther from the centerline is acceptable.
Allow adequate space above the bracket for it to release and rotate the sensor upward.
Height without
speed sensor
191 mm (7.5")
Note 1: Do not mount the sensor in an area of turbulence or bubbles: near water intake or dis-
charge openings; behind strakes, struts, fittings, or hull irregularities; behind eroding paint (an in-
dication of turbulence).
Note 2: Avoid mounting the sensor where the boat may be supported during trailering, launching,
hauling, and storage.
Note 3: For single drive boat, mount on the starboard side at least 75 mm (3.0") beyond the swing
radius of the propeller.
Note 4: For twin drive boat, mount between the drives.
Installation of Bracket
1. Cut out the installation template (enclosed with transducer) along the dotted line.
2. At the selected location, position the template, so the arrow at the bottom is aligned with the
bottom edge of the transom. Being sure the template is parallel to the waterline, tape it in
place.
Warning: Always wear safety goggles and a dust mask.
Height with
speed sensor
213 mm (8.4")
Align template vertically
Align template with the
bottom edge of the
Height
75 mm (3.0")
minimum beyond
the swing radius
Deadrise angle
Slope of hull parallel to
waterline.
9

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