Song Meter SM4M User Guide Supplement
2 Setup
Wildlife Acoustics, Inc.
page
16
The eyebolt was tested with a 150lb (68 kg) load. A heavier maximum load such
as an anchor could be used underwater; however, do not exceed this limit as a
best practice.
The unit can be tethered directly to an anchor for diver release, or tethered to a
surface structure. Acoustic releases are commercially available which allow the
unit to be released from the ocean floor by playing an acoustic signal from the
surface. In this case, it is necessary to use a subsea float to increase the visibility
of the housing when it surfaces.
The Deep Water unit is not positively buoyant with any batteries installed and
will need additional flotation to return to the surface on its own.
NOTE
: All metal hardware used on the SM4M is 316 stainless steel. If dissimilar metal is
used for deployment that is near or contacting any of the hardware, a zinc or aluminum
sacrificial anode should be used to prevent galvanic corrosion.
