442704/A
269
c
Ask the bridge to abruptly turn off all engine power and - if possible - change the
pitch of the propellers to zero.
d
Read the noise value from the noise circle.
e
For every knot the speed is reduced, read the noise.
(If you find it more convenient, type the data directly into the spreadsheet.)
f
Fill in the result table.
9
When all the measurements have been made, type the data (speed and noise) into a
spreadsheet to create the curve.
10
Hoist the transducer back up to its upper position.
Result
Speed/Frequency/Noise
Speed
Frequency
Noise level
20
19
18
17
16
15
14
13
12
Summary of Contents for Simrad ST90
Page 1: ...kongsberg com simrad Simrad ST90 REFERENCE MANUAL ...
Page 2: ......
Page 337: ...442704 A 335 Related topics Sonar views page 326 User interface ...
Page 413: ...442704 A 411 Related topics Menu system page 375 Display menu page 384 Menu system ...
Page 631: ...442704 A 629 Related topics Concept descriptions page 626 Concept descriptions ...
Page 687: ......
Page 688: ... 2021 Kongsberg Maritime ISBN 978 82 8066 211 8 ...
Page 689: ......
Page 690: ...Reference Manual Simrad ST90 ...