Reson SeaBat 7125 ROV, Operator'S Manual

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INSTALLATION INSTRUCTIONS
SeaBat 7125 ROV Operator‟s Manual
Page 156 May 30, 2011
Version 3
B.6.5 Wet-End Mounting
Take care that the sonar head assembly is electrically isolated from the
structure to avoid corrosion problems. RESON provides an optional mounting
bracket, which is described in
appendix D.4 7125 Mounting Bracket .
The head should be immersed in water to a depth of at least 0.8m. This
ensures that noise from surface waves and turbulence generated by the
mounting structure does not degrade performance.
Ensure that submersion depth is sufficient to avoid shadows from the keel,
hull, or other obstacles.
NOTE
The sonar head is not designed to be hydrodynamic at speeds in
excess of two knots. Vibration and oscillation will become
evident, if the projector and receiver are not rigidly mounted. To
minimize the unsupported length, place a support as close to the
waterline as possible. Fairings can also be used to improve
hydrodynamic performance.
B.6.6 Sonar Head Assembly Orientation
The sonar head assembly should be mounted with the faces of the arrays oriented
vertically downwards. Ideally, the receiver is mounted across track, while the projector
(or projectors) is mounted along track and aft of the receiver. If necessary, the projector
may be oriented forward or the head rotated away from vertical with allowances made in
the processor setup and data acquisition software.
CAUTION
An alternate mounting makes the projector more susceptible to impact damage and
collection of trailing debris.
The faces of the projector and receiver must be aligned in the vertical (“Z”)
plane /-2.0mm.
The alignment along-
ship (“Y”) plane and across-ship (“X”) plane should be
/-250.0mm.
The actual sonar head assembly installation must be reflected in the user interface
settings (see
section 4.2.3 Hardware Configuration ).