Installation manual

SimradES70
Useahorizontalsupportbaronlargetransducers
Westronglyrecommendthatlargetransducersarettedwithahorizontalsupportbar.
Thepurposeofthissupportbaristoprotectthetransducerfromdamageintheeventof
slamming.Thishappensifthevesselhullclimbsoutofthewaterinheavyseas.The
forceofthewaterwhenthehullfallsdownmaypushthetransducerupandcausedamage
toitsmounting.Thesupportbarcanbesecuredtothemountingringusingthreadedrods.
Slammingistheimpactofthebottomstructureofashipontotheseasurface.It
ismainlyobservedwhilesailinginwaves,whenthebowraisesfromthewater
andsubsequentlyimpactsonit.Slamminginducesextremelyhighloadstoship
structuresandistakenunderconsiderationwhendesigningships.
—Wikipedia
Example:Boxkeelinstallation
Thegurebelowillustratesasymmetricalboxkeelinstallation.
Figure32Boxkeelinstallation
ABoxkeel
BU-shaped
support
bar(only
recommended
onlarge
transducers)
CStufngtube
DCableinsteel
conduit
ECableservice
loop
(CD1701
1A)
A
B
D
C
E
Transducerushmountedinasteeltank
Flushmountingisusedonverylargevesselswithahullsodeepthatnoairbubblesare
foundbelowthehull,andonvesselsoperatinginshallowharboursorwaters,where
aprotrudingblistercannotbeaccepted.
Thestandardprocedureforushmountingonasteelvesselistoweldasteeltankinside
thehull,andmountthetransducerintothistank.
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