7.1.1 The wires and ropes used as part of suspension, mooring, anchoring and
towing cables are to be of sufficient size, and made from materials which take into
account the operating environment. All such systems used with the submersible in the
submerged condition should be fitted with quick-release mechanisms operated within
the submersible. Consideration should be given to the effects of corrosion,
biological attack, fish bite, longitudinal velocity of craft and water velocity,
including inter-boundary layer waves, and transverse oscillation. Proposals, with
supporting calculations, should be submitted for consideration. The use of wire
ropes of cross-lay construction is not normally recommended unless such ropes are of
a non-spin type.