The operating manual for the rig should clearly show the location of watertight closures and should be complied with during the tow. Deck openings such as sounding tubes should be protected from damage 23. Consideration should be given to the modification all weather deck preload hatch covers, vent fan covers, cargo hatch cover, etc. with clamp bars or welded strapping to prevent opening from sea action. Rig service take on lines Such as out, barite, fuel, potable water, or drill water located on the outer lull areas should be capped and protected from sea damage by sea action. Pumping Arrangements 26.
Pumps are to be maintained in a state of readiness throughout the tow.
Compartment Sounding 27. All hull compartments and void spaces should be fitted with sounding tubes. All sounding tubes should be clearly identified and fitted with caps that are capable of being tightly secured. Soundings should be taken at least every 12 hours of all void and preload tanks. Hull compartments should be inspected or sounded also and the results should be logged for the duration of the 29.