FLOODING OVERVIEW FLOWCHART External Investigation of Flooding Flooding Fluid Temperature Ensure Personnel Don Protective Clothing Before Entering Space for Extended Periods Low Temp Poses Exposure Threat to Personnel Yes Compartment Above Waterline Yes Set FLBs, Isolate Flooding Dewater with Installed Drains No No Send Investigators Into Space Determine Depth of Flooding Internal Investigation of Flooding Level Approaching Overhead Secure Space Set FLBs Yes No Flooding from Structural Damage Yes Go to Chart “1” Structural Damage Rate of Flooding No Flooding from Pipe Rupture Yes Go to Chart “2” Pipe Rupture Flood Before Source Determined Yes Secure Space Set FLBs No Investigate Nearby Compartments Expand FLBs No Flooding from Progressive Flooding Yes Set FLBs on Affected Compartment No Isolate Source of Flooding Source of Flooding Go to Chart “3” Dewatering Dewater Space Yes Determine Source/Type of Fluid No Monitor Ship Stability, Continue DC Actions, Investigation Electrical Power in the Space Electrical Power Poses Threat to Personnel Secure Space, Set FLBs Yes Determine Availability of Off-Ship Repair/ Salvage Teams No

- FLOODING FROM STRUCTURAL DAMAGE CHART 1 - FLOODING FROM STRUCTURAL DAMAGE Flooding from Structural Damage Set FLBs (if not set) Survey Flooding Source Continue with Flooding from Structural/Damage Path & Pipe Rupture Path Caused by Structural Damage/ Pipe Ruptures Yes No External Isolation Isolate without Sending Personnel into Space Yes Conduct External Isolation No Evacuate Space & Securing Compartment Depth of Water Prevents Access Yes No Patch/Plug Flooding Source Dewater while Patching/Plugging in Progress Shoring Required for Plugging Yes Go to Chart “4” Shoring No Structural Strength Compromised Yes Go to Chart “4” Shoring No Monitor Stability/Structural Integrity; Continue DC Actions/ Investigation of Damage

CHART 2 - PIPE RUPTURE JP5 CHT Hydraulic Fluid Lube Oil Flooding from Pipe Rupture Set FLBs (if not set) Fluid Type/ Characteristics (Type/Temperature/Pressure) Yes Hazardous Fluid? Hazardous JP5 CHT Hydraulic Fluid Lube Oil Fuel Oil Steam Refrigerant No Don Personnel Protective Equipment Rupture Location, Size, Extent Simultaneously Use Chart “3” Dewatering Redirect or Cover Fluid Can Rupture Be Isolated with Installed Valves? Can System Supplying Pressure to The Piping Be Secured Go to EOSS, SDOSS, MSFD No No Unisolatable Rupture Yes Yes Is the System Supplied by the Piping a Vital System that Must Stay On Line? Secure Pressure Source Yes Apply Patch No Other System Pressure Isolate Rupture with Valves Shut Additional Valves No Was Isolation Effective? Yes Will Repair Be Permanent or Temporary? Temporary Restore System, Check for Leaks Apply Patch Permanent Conduct Permanent Repair When Time Permits

CHART 3 - DEWATERING Space Requires Dewatering Dewater Effectiveness Isolate Flooding Source/Establish FLBs Secure Source/ Compartment if Source Cannot Be Isolated Flooding Level Comparable to Ship’s Waterline Yes Establish Dewatering Priorities No Secure Source, Augment Dewatering Equipment Water Level Increasing Yes Installed Dewatering Systems Available Yes Use Installed Dewatering System No No Water Level Decreasing Yes Augment Dewatering Equipment Firemain Available Yes Dewater Using Portable Eductors No No Monitor Ship’s Stability Electrical Power Secured Dewatering Adversely Affects Ship’s Stability Yes Reexamine Stability/ Dewatering Priorities Repair Personnel Evacuate Space Yes Rig Electrical Submersible Pumps No No Continue Dewatering/Restore Vital System Extra Personnel Required to Operate Pumps Yes Obtain Additional Personnel Monitor Stability/Structural Integrity; Continue DC Actions/ Investigation of Damage No Dewater Using P100 or P250 Portable Pumps

CHART 4 - SHORING Structural Damage Determine Shoring Type Can Direct Compression Be Used? Yes Use I or H Shore No Determine Anchor Points Use K Shore Build Additional Anchor Supports Rapid Support Required Yes Use Metal Shores No Use Wood Shores Determine Staging/Cutting Area Erect Wood, Metal, or Combination Support/Anchor Structure Additional Support Structure Required? Yes No Measure/ Cut Shores Erect Structure Tighten Structure Set Shoring Watch