Installing the System MicronNav System
0656-SOM-00001-07 14 © Tritech International Ltd.
The USBL Dunking Transducer is supplied with a short mounting pole (0.5m long) that will
screw into the 22mm diameter coupling on the top of the USBL Head mounting flange and
provide a clamping point for attaching to the users installation. The mounting flange coupling
is a standard 22mm water pipe fitting (UK) enabling a standard 22mm diameter copper water
pipe to be used as a mounting pole fitting directly to the head.
An alternative method of mounting the head is to fabricate a dedicated mounting bracket
and fasten to the USBL mounting flange. It is recommended however that a non-magnetic
material is used for the fixing so as not to affect the integral Magnetic Heading and Pitch/
Roll sensor, if the user wishes to use stainless steel for the fabrication some Duplex Alloys
such as FerraliumSD40 are particularly good but are rather exotic, stainless steel 316 (typical
material used for sub-sea housings) however has little effect on the compass readings and
could be used as an alternative.
Caution
When operating from a vessel consideration should be given to the speed the
vessel is likely to be travelling and the resultant force/pressure the USBL Dunking
Transducer mounting arrangement will need to withstand.
The yellow line indicates the front of
transducer head. This should be positioned
facing in the required forward position to
ensure correct representation on the PPI
display when set to “Ships Head Up”. If
operating from a fixed platform/dockside this
would normally be facing away from the
platform/dockside and if operating from a
mobile platform this would normally align with
the front of the vessel.
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