[PSUBS-MAILIST] G.L. Rules Exostructure & equipment

[Alan]

Back in to my G.L. summary after a good Christmas break.
   The normal load on the exostructure should be no more
than .6 of the yeild strength.
   No air bubbles should remain in the exostructure when diving.
   Proof of the quality characteristics of the material is required.
   Care taken regarding features that may cause entanglement.
   The shell is reinforced in the area of the diving tanks & no elements of the
shell are to be screwed to the diving tanks.
   As far as necessary submersibles are to be equipped with ram frames
to protect the pressure hull & other vulnerable components.
   In the addition of the exostructure there needs to be an ability to inspect 
& preserve the pressure hull.
   There needs to be lifting points for salvage. they need a safety against rupture
of 8 times the safe working load ( & marked with safe working load )
   A towing point is to be provided & designed so that the access opening
can't be flooded at maximum planned towing speed.
   Anchoring equipment needs to be jettisonable.
   Bollards cleats etc are required for mooring.
   Masts radar & sensory equipment as well as air pipes are normally retracted
in to the exostructure while submerged. Their height is on a case by case basis.
   Manipulators are to be jettisonable & by a means that is operable upon main 
power failure.
   Active corrosion protection ie sufficient sacrificial anodes, are required.
   Corrosion protective painting to G.L. standards is required inside the pressure
hull.
Cheers Alan
   
   

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