20 Copyright © 2011-2013 SM2M+ User Manual
Retrieval and Shipside Refurbishment
Retrieval
Regardless of method of retrieval, take care in getting the unit
shipside not to damage the hydrophone. If planning on using hooks
to snare the housing, it might be best to deploy with a ring of
floating nylon line attached to the bottom eyebolt to give a
hooking point. It would also be possible to attach rigging to the
unit use large stainless steel band clamps around the diameter of
the housing.
Opening Recorder
After a long deployment in shallow water, the unit is likely to have
accumulated significant biofouling. It may be necessary to clean
the top of the cylinder to access the holes for the spanner
wrenches.
On the SM2M+ Submersible, the hydrophone cage must be
removed to allow the spanner wrench to interface with the top
cap side holes. Remove the cable tie around the hydrophone cage
and pull the four cage legs from the top cap holes to fully remove
the cage. This is not necessary, nor is it possible to remove the
cage on the Deep Water unit.
To get the top cap started, give a good impulse of force to the
spanner wrench, and then proceed opposite sealing as shown in
Figure 9.
Flash Card and Battery Replacement
To remove the board, first disconnect and remove the hydrophone
cable and then simply pull the board from the housing using the
large finger hole at the top of the board. The D cell batteries can
