RiverPro and RioPro ADCP Guide October 2017
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Page 29
In-Hull Mounting
The in-hull mounted RiverPro/RioPro is common when it is intended to keep the system on a single ves-
sel or when over-the-side mounting is not practical for the vessel. For this type of mounting, there are is-
sues of beam clearance and access. Consider several potential problems before deciding where to install
the transducer assembly. See the outline installation drawings for specifications on the standard
RiverPro/RioPro transducer heads.
Ideally, install the transducer head:
• Where it is accessible both internally (for access to transducer electronics) and externally (to
remove biofouling).
• Away from shipboard protrusions that reflect RiverPro/RioPro energy. Allow for a reflection-
free clearance of 15° around each beam (see the outline installation drawings).
• Away from other acoustic/sonar devices, especially those operating at the same frequency (or
harmonic) of the RiverPro/RioPro.
• Close to the ship’s fore-to-aft centerline. As distance from the centerline increases, vertical
accelerations caused by the roll of the ship also increase. These accelerations can cause addi-
tional uncertainties in RiverPro/RioPro velocity measurements.
Other considerations may be:
• Ease of installation.
• Portability (wanting to move the instrument from vessel to vessel).
• Permanent installation.
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