F-POD USER GUIDE 11
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Use C-links that dissolve after a set time in the water and then release
a recovery buoy from the bottom.
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Use divers to deploy and recover your PODs.
Mooring lines
Design the mooring using a mixture of sinking ropes and buoyant ropes.
Use sinking ropes so that no loops of cordage float at the surface to
entangle propellers and buoyant ropes that do not lie on the bottom and
suffer excessive abrasion.
Use knots or fixings that grip the POD lid so that there is no possibility of
continual movement, creating noise that may fill the SD card. If you use a
shackle you can tape this with electrical tape.
The POD lid has three 10 mm diameter holes for attaching mooring lines
such as double-braided 8 mm polyester mooring line. The mooring line
should go through all three lid holes and under the loop created between
the first two. We have never seen this move, but we still put an overhand
knot in the end of the line just to be sure.
Using anchors
A few concrete blocks are not adequate on a sandy sea bed as these are
dynamic and move with tidal currents. Massive concrete anchors, digging
metal anchors or heavy metal anchors are needed. Manhole covers with a
central attachment are effective but can be hard to lift.
Buoys
Try to use the smallest buoy that you will be able to find on retrieval. This
helps to minimises drag in storms. However, some users have deployed
large surface markers with radar reflectors and 4 tonne anchors.
You might prefer to use a short line that results in the buoy spending most
of the time submerged due to the tide stream or tide height, appearing only
briefly at the surface when the tide is slack or at low water. However, make
sure the float will not be collapsed by the water pressure.
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