10.4.3 User Manual Contents April 17, 2020
Firmware: 5.2.1 Page 25 of 142
iWBMS Sonar Head & IMU
As noted in the section above, the sonar must be mounted with the transmitter (projector) pointing
aft. Mount the sonar in line with the keel or centerline of the survey platform to within 0.5°. This is
not so critical when the entire assembly is mounted to a single survey pole.
Accommodations must be made for the sonar/IMU cable when mounting. Cables must run up
through the center of the iWBMS(x) bracket.
CAUTION: Run Cables Through Center of Bracket
The mounting bracket requires that wet-end cables be run through the top
center opening of the iWBMS(x) bracket, which is attached to customer
supplied sonar mounting pole. If the mounting pole is a pipe (recommended),
its minimum inner diameter should be 5.8cm. If a pipe is not used, ensure
that exposed cables are securely fastened to avoid damage.
Use at least 4 bolts (2 forward and 2 aft) made of high-quality stainless steel to ensure of anti-
corrosion especially in saltwater environments. Use a lock washer and/or an anaerobic thread
adhesive such as Loctite 242 Blue to prevent loosening of sonar during long deployments.
The bolt hole pattern shown above is applicable for all integrated WBMS systems. The sonar and
IMU cables should never be connected or disconnected underwater. Ensure all connector pins and
sockets are clean, dry and shin. Always use the supplied connector caps on wet-end, cables and
topside. Use a synthetic O-ring lubricant on connector O-rings that are in good condition.
If pole-mounting the iWBMS(x), the cables should be run through the sonar pole. The pole should
have a minimum internal diameter of 5.8cm to allow the connector(s) to pass through. The iWBMSe
and iWBMSc requires the pole be centered over the single connector.
The iWBMS(x) has been tested at a transit speed of 20 knots without damage to the system. If not
conducting a survey, it is best to transit with the sonar out of the water especially if the mount is less
robust. This is to protect the system from physical damage from flotsam.
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