Installation manual

Simrad SP60
148
851-164574 / C
Speed
(
K
n
o
t
s
)
Bearing 0 degrees
(Knots)
Stable speed Acceleration Retardation
0
2
4
6
8
10
12
14
Table 9 Noise verification
4 Make a dashed line plot of the acceleration noise into the
Noise/speed plot, and a dotted line for the retardation noise.
By comparing these three plots it should be possible to sort out if
the main noise is caused by flow noise or engine/propeller noise.
If the main noise is caused by flow noise, the ship’s hull should be
thoroughly i nspected during next docking. If the noise is caused by
the engine propeller, ensure that the propeller is not chipped or
corroded.