Technical information

SimradEK60
Figure3Soundabsorption
Frequency(kHz)
Soundabsorption(dB/km)
0
(CD010014A)
0
10
20
30
40
50
60
25 50 75 100 125 150 175 200
35% SALIN
ITY
30
25
20
15
1
0
5
0
from:Francois&Garrison,JASA,December1982
10 C
200mdepth
pH=8
o
Anchoring
ThefollowingriggingdescriptionistoagreatextentreproducedfromICESreport144.
1Findalocationwithcalmandshelteredwater.
•Avoidareaswithlargedifferencesintidalheight,asthisgivesstrongtidalcurrent.
•Avoidareasnearrivermouthsandharbourswithheavytrafc.
•Anareawithlittleornoshpresentisfavourable.
2Ensurethatthedepthissufcientforseparationofsphereandbottomechoes.
3Pullaropebeneaththehullfromonesideofthevesseltotheother.
4Anchorthevessel.
Itisdesirabletoworkinwaterasdeepaspossible,consistentwithmaintainingastable
platform.Bothbowandsternanchoringormooringisrecommended.
40
164692/D