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For this reason, the transducer should to be mounted on a fairing block

which holds the transducer away from the hull and which directs the

flow of aerated water around the sides rather than over the face of the

transducer. On deep keeled vessels, care must be taken to ensure that the

transducer beam wil not be blocked by any part of the keel. Although the

appropriate mounting location depends on the type of vessel and its nor-

mal operating speeds, a practical choice is usually somewhere between

one third and one half of the vessel’s water line length from the bow.

Levelling blocks may be designed accordingly to meet this requirement.

F The more the transducer protrudes from the hull, the better the results

will be. Particularly the lower frequency operation, interference from pro-

peller noise can be a significant problem. This can be seen as an increase

in the ’noise’ on the echosounder display when the propeller speed is in-

creased. To help reduce this, the transducer’s mounting face may be an-

gled slightly forward on the order of 5° for the 50 kHz transducers and

3° for the 200 kHz transducers. The goal is to incline the transducer so

that a line of sight along the transducer’s radiating surface passes below

the propeller.

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CE32 MKII NMEA RS2500 RS2800

0IN 4ERMINALSTRIP 0ORTTO

1 White TX A RD+1 0IN 5

2 Brown TX B RR+1 0IN 9

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CE32 MKII NMEA RS5660/RS5665

0IN 3 Yellow RX A 0IN 2

0IN 4 Green RX B 0IN 5

%XTERNALPOSITIONHEADINGANDSPEED

CE32 MKII NMEA

0IN 3 Yellow RX A NMEA0183

0IN 4 Green RX B

/PTIONALCONNECTIONS

#HAPTER #%-+)))NSTALLATIONANDSERVICE

100

Simrad ce32 mkii User Manual

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