Furuno TZT2BB Installation Manual page 15

1.4.3 How to install a transducer from inside the hull
The transducer may also be installed inside the hull on FRP boats. However, this in-
stallation method affects the ability to detect the seabed, fish and other objects be-
cause the ultrasound pulse is weakened when it passes through the hull.
Note: This mounting method should not be used to mount transducers that support
the RezBoost
performance is greatly degraded.
Necessary tools
The following tools are required:
• Sandpaper (#100)
• Marine sealant
• Water-filled plastic bag
Remarks on installation
• Do the installation with the ship moored at a dock, etc. The water depth should be 6.5
to 32 feet (2 to 10 meters).
• Turn off the engine.
• Do not power the unit with the transducer in the air, to prevent damage to the trans-
ducer.
• Do not use this method on a double layer hull.
• Before attaching the transducer to the hull, check that the site is suitable, by following
steps 1 to 3 in the installation procedure below.
Installation procedure
The attenuation of the ultrasound pulse varies with the thickness of the hull. Select a
location where attenuation is the lowest.
1. Select 2-3 locations considering the four points mentioned below.
• Mount the transducer at a location 1/2 to 1/3 of the length of your boat from the
stern.
• The mounting location is between 15 to 50 cm from the centerline of the hull.
• Do not place the transducer over hull struts or ribs which run under the hull.
• Avoid a location where the rising angle of the hull exceeds 15°, to minimize the
effect of the boat's rolling.
2. Decide the most suitable site from the locations selected.
1) Connect the power cable and transducer cable to the display unit.
™ ™
, ACCU-FISH and/or Bottom Discrimination Display feature, since
Centerline
50 cm
50 cm
1/2
1/3
15 cm
Transducer
15 cm
mounting
location
1. MOUNTING
1-7