Transducer Mounting Location - Simrad NSS evo2 series Installation Manual

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Transducer mounting location

The NSS evo2 displays (with exception to the 'M' models) are fitted with both StructureScan
and Chirp sonar capability and may be connected to a variety of transducers.
The chirp sonar connector suits all standard blue connector transducers, including
conventional and wide frequency band (ie chirp) models. Both include in-hull, through-hull,
and transom mount options.
The StructureScan connector has two options; the transom mount transducer and the
through hull transducer. Structure scan transducers are not suited to in-hull installation.
Transducer location selection and installation are two of the most critical steps in sonar
installation. To function properly the transducer must be in the water at all times, and in a
location that has a smooth flow of water when the boat is moving.
¼ Note:
StructureScan and Chirp can't be operated simultaneously on the NSS evo2. If simulta-
neous operation is desired, an external module such as the LSS-2, SonarHub, BSM-2, or second
NSS evo2 must be fitted.
Research
Before starting the installation of the transducer, it's advised to check the following;
•
Find out if the boat builder has a recommended installation location
•
Establish direction of rotation of the propeller(s) - where mounting level or aft of propellor(s)
•
Watch actual water flow when boat is travelling at cruising speed to determine the area of
transom with cleanest flow (least bubbles)
Avoiding common turbulence areas
The primary aim is to stay clear of propeller and hull generated turbulence, while mounting
the transducer as close to the center of the vessel as possible.
1 2 3
1 Avoid mounting within 1m (3.3') to port of propeller
2 Conventional clockwise propeller rotation
3 Avoid mounting within 7.5cm (3") to starboard of propeller
4 Best mounting location - undisturbed water flow
5 Planing strake - avoid mounting behind here
¼ Note:
Reverse the distance guides (1 & 3) from propeller where engine is of counterclockwise
configuration.
¼ Note:
Boats with strakes or ribs on the hull can create large amounts of turbulence at higher
speeds. A good transducer location on these types of boats is between the ribs closest to the
engine.
¼ Note:
If the transducer is not placed in a smooth flow of water, interference caused by
bubbles and turbulence may show on-screen in the form of random lines or dots. The unit
could also lose bottom signal when the boat is on plane.
¼ Note:
Trim tabs will vary in the amount of turbulence they create as they are adjusted, stay
clear of these.
Hardware installation | NSS evo2 Installation Manual
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