108 HANDLING CHARACTERISTICS 



Caution : Great care must be exercised so that the tanks 1 and 3 are blown symmetrically. 

 It may be desirable to blow the bow (tank 1) slightly ahead of the stern; the stern may then be 

 corrected (lifted) by blowing air into the skirt or by control of valves CI and C3. 



Caution : Valves A-2, A-3, A-6 or A-7 may not be used to control trim as this may pro- 

 duce a dangerous pressure differential in the tanks. 



When tanks 1 and 3 are blown clear, Sealab will float at the normal waterline of about 

 1 ft-8 ins. Close valves C-1 and C-3. 



Check that valve A- 8 is closed. Vent conning tower by opening valve C-4. 



Gradually vent Sealab via the salvage hose ensuring that large access hatch is holding. 



Warning: Sealab may not be entered at this time until it has been ventilated with air suf- 

 ficiently to support life^ 



a. Open conning tower top hatch 



b. Ensure conning tower air can support life. 



c. Bail lower conning tower hatch well. 



d. Open lower conning tower hatch. 



Caution : Do Not enter Sealab. 



Ventilate interior of Sealab with air from the rough umbilical and other means until O2 

 content is sufficient to support life and that toxic gases are not present. 



Enter Sealab, with safety line tended by man in open air. 



When atmosphere in Sealab is safe, perform tasks as required. The first should be placing 

 strongback on large access hatch and secure. 



Prepare Sealab for tow. Refer to towing bill. 



Gear Take Sealab in tow to Long Beach. Speed not to exceed 4 knots. 



RIG FOR SURFACE TOW OF SEALAB H AFTER RAISING 



1. Install strongback on main access hatch and bolt securely. 



2. Install towing lights. 



3. Check internal pressure port bolts for tightness. 



4. Check that equalizing plugs on each viewing port are open from the outside. 



5. Install external protective covers on the viewing ports. 



6. Make provisions to supply air from the towing ship Gear in event of emergency. 



7. Secure all systems and switch off power. 



8. Vacate Sealab and shut the lower conning tower hatch securely. 



9. Shut upper conning tower hatch and bolt down securely. 

 10. Install and test the atmosphere gas loss alarm. 



