Installation manual

Introduction
45
851--160117 / B
SPEED
(
K
N
O
T
S
BEARING
(
K
N
O
T
S
--120° --60° 0° +60° +120° +180°
0
2
4
6
8
10
12
14
Table 7 Noise measurements
When the measurements are finished, make a plot of the noise for
0° bearing into table 9. The noise level at full speed should
preferably not exceed the 0 dB line.
The noise/speed curve in table 9 can give a picture of the ship’s
best search speed.
In case of very high ship noise level, the RCG will regulate the
receiver gain automatically down. This low gain will then cause
a reduction in the receiving range.
To find out if a high noise level is caused by flow noise of the hull
or by the engine/propeller, make the test described in the
following pages.