Diving Ops

Question 1

What to do before?

Answer 1

• Deconflict ship activities
• Conduct Check 4, pre-ops brief
• Prepare RAMS and read up OCP
• Check CAT status and sea state conditions (Tidal stream < 1kn/ sea state < 2)
• Inform IOC (1 day before and just before the op) and request clearance
• Pipe “No starting of main engine, no transmission of all UW equipment, no dumping of gash overboard. All heads are out of bounds less mine hunting heads, divers working below.”
• Fly alpha flag and interco romeo yankee
• Prep seaboat for launch
• Ensure shark rifle man close up on boat deck with 1 carbine and 1 box of 2 magazines, 32 ball, 8 tracers
• Ensure deck officer and dive officer (from NDU) is present
• Ensure LOTO (Sonar electrical supply so sonar mess and CIC [Ship office UPS]/ Main Engine [MER battery]/ Waste water pump [MER]/ Septic Pump [MER]/ Doppler log [CIC]/ Echo Sounder [CIC]/ VSP hydraulic pump [AER]/ EM Log [bridge]/ Fire pump 1&2 [ECR])
• Ensure no dumping of gash over board
• Call ECR to ensure all heads are locked expect mine hunting heads
• Call ECR/Bridge to ensure all 4 main engines are off and clutched out
• Ensure functionality of decom chamber
• Ensure air reservoirs fully charged and chamber air and oxygen supplies connected and tested

Question 2

What to do during?

Answer 2

• Reminder pipe every 15 mins
• Check CAT status and safety of personnel
• Divers to conduct checks on their gears and equipment
• At night (Turn of all deck lights/ Turn off bridge light/ Cover all portholes to minimize ambient light/ Turn on red-white-red on the mast/ Avoid opening doors and hatches on seaward side)

Question 3

What to do after?

Answer 3

• Pipe “The restriction to main engines, underwater equipment, dumping of gashes overboard and use of heads is now lifted, divers working below completed.”
• Inform IOC
• Haul down flag