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Delivery and Deployment of the U.S. Navy's Submarine Rescue System

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Delivery and Deployment of the U.S. Navy's Submarine Rescue System Delivery and Deployment of the U.S. Navy’s Submarine Rescue System Andrew DeSpirito Advanced Undersea Systems Program Office (PMS394) Naval Sea Systems Command Agenda • Submarine Rescue Diving and Recompression System (SRDRS) Overview • CONOPS • Vessels of Opportunity (VOOs) • Classification and Certification • Conclusions • Questions 12/9/2008 SNAME Chesapeake Section 2 Submarine Rescue Diving and Recompression System Overboarding Power Umbilical Load Sheave Alleviator Deck Transfer Control Lock Van SDC Umbilical No. 1 Lift Line Umbilical Gas Winch Racks Lift Winch Cursor Frame SITS SDC Umbilical No. 2 PRM Auxiliary Van Generator Van TS VOO 12/9/2008 SNAME Chesapeake Section 3 Operational Parameters • Design Depth: 2,000 fsw • Max. Operational Sea State: 4 • Max. Current Speed: 2.5 kts • Max. DISSUB Angle: 45° • Max. DISSUB Internal Pressure: 5 ata • Rescue Capability: 155 DISSUB Personnel 12/9/2008 SNAME Chesapeake Section 4 History • Original concept was a “saturation diving system” – Diving bell carried divers to DISSUB – Divers cleared hatch and prepared for DSRV rescue • Not intended as a rescue platform 12/9/2008 SNAME Chesapeake Section 5 History • Revised concept included a pressurized rescue module to rescue sailors from DISSUB • Remotely operated from control van mounted on the rescue vessel 12/9/2008 SNAME Chesapeake Section 6 SRDRS Concept Development 1992 1994 1996 1998 Present Remotely Operated Atmospheric Atmospheric Diving Suit Vehicle (ROV) Diving Suit (ADS) (ADS) Saturation Diving System Recompression Subsystem Deep Submergence Pressurized Rescue Module Rescue Vehicle (PRM) and Surface (DSRV) Decompression System (SDS) 12/9/2008 SNAME Chesapeake Section 7 SRDRS Configurations Submarine Rescue System – Rescue Capable System (SRS-RCS) • Capable of performing Umbilical submarine rescue not Winch requiring decompression PRMS Gas Rack treatment Control Van • Currently certified DSRV Spares Van LARS Deck rescue seats will require no Cradle additional work or analysis to remain certified PRM • Permits retiring of DSRV 2 Generator • 2,904 ft footprint Van Logistics • 153 LT weight Van • Rescue Ready 30 Sep 2008 12/9/2008 SNAME Chesapeake Section 8 SRDRS Configurations Submarine Rescue System – Transfer Under Pressure (SRS-TUP) • Capable of pressurized Umbilical SDC rescue up to 5 ata Winch Control Van • Transfer under DTL pressure from PRM via LARS Deck Transfer Lock to PRM Surface Decompression Chambers 2 • 3,332 ft footprint Gas • 224 LT weight Racks Generator • Planned completion in Van SDC 2013 Auxiliary Van Spares Van 12/9/2008 SNAME Chesapeake Section 9 Concept of Operations RESCUE DEPOT • Prepare/secure SRS equipment • Load out onto trailers • Load out (roll-on) aircraft Air Transport RESCUE AIRFIELD • Offload aircraft • Load out trailers DISSUB • Transit from airport to port ALERT • Stow air transport pallets Truck Mobilize Ground Aircraft SUBMISS Transport RESCUE PORT • Reposition Cranes Load SRS • Offload SRS Trailers on VOO RESCUE SITE • Loadout SRS on VOO VOO Transit • Secure SRS to Templates Transit to • Test/Checkout SRS DISSUB • Secure VOO for Transit DISSUB SITE Move into Moor over Rescue Operations Decompression Operations Return DISSUB (PRM) (SDS) to Port 12/9/2008 SNAME Chesapeake Section 10 Pressurized Rescue Module System (PRMS) • Consists of the Pressurized Rescue Module (PRM), Transfer Skirt, Control Van, and other supporting equipment • Provides the capability to transport DISSUB personnel to the surface to be transferred to SDS for controlled decompression Pressurized Rescue Module Transfer Skirt 12/9/2008 SNAME Chesapeake Section 11 Pressurized Rescue Module System (PRMS) General Characteristics • LOA: ~24 ft • Width: 8 ft • Height: 8 ft (w/o Skirt) 14.5 ft (w/Skirt) • Weight: 45,242 lbs • Displacement: 45,500 lbs • Buoyancy: +200 lbs • Crew: 2 attendants 16 rescuees 12/9/2008 SNAME Chesapeake Section 12 SRS Handling System Launch and Recovery System (LARS) • Designed for installation on Vessels of Opportunity (VOOs) • Lightweight and compact design • Active Motion Compensation System to mitigate snap loading on lift lines • Launch Latch Assembly provides active pitch control • Cursor Frame allows PRM mating with ±30° misalignment 12/9/2008 SNAME Chesapeake Section 13 SRS Handling System Overboarding Umbilical Power Sheave Load Alleviator Launch Latch Assembly Ship Interface Template Sets Overboarding Cylinder Lift Line Hydraulic Power Unit Cursor Frame Lift Winch 12/9/2008 SNAME Chesapeake Section 14 Mission Support Equipment Ship Interface Template Set (SITS) • Provides structural support to the SRDRS elements • Welded to the VOO deck • Designed to enable rapid alignment and integration of SRDRS elements Deck Cradle • Structural frame used to support and secure PRM on the VOO deck 12/9/2008 SNAME Chesapeake Section 15 Vessels of Opportunity (VOOs) • Commercial or naval vessels that are in the vicinity of the DISSUB and may be used as platforms to carry out SRDRS operations • VOOs eliminate dependence on specially modified submarines (MOSUBs) or ships (MOSHIPs) • Candidate VOOs include Offshore Supply Vessels (OSVs), Platform Support Vessels (PSVs), and Anchor Handling Tug-Supply (AHTS) Vessels • A large pool of VOOs are available worldwide and will facilitate rapid rescue response 12/9/2008 SNAME Chesapeake Section 16 Vessels of Opportunity (VOOs) VOO Requirements Seakeeping • Length: 220 ft (min) • Beam: 40 ft (min) Personnel Accommodations: 25 persons (min) Available Deck Area 98 ft x 34 ft (min) Minimum Deck Strength • Static 614 lbf/ft2 under LARS 512 lbf/ft2 overall • Dynamic 1,024 lbf/ft2 Position-Keeping • Maintain position within a watch circle <500 ft radius using 4-point moor • Pursuing change to Navy requirements to permit use of DP ships (ABS DPS-2 minimum) 12/9/2008 SNAME Chesapeake Section 17 Minimum Ship Methodology • Methodology for quickly assessing whether the deck of a particular VOO has sufficient structural strength to support the installation of the SRDRS • Common structural features of various VOOs used to create a longitudinally-framed and a transversely-framed “paper ship” • Scantlings for these models calculated using the ABS Steel Vessel Rules (Under 90m) and the DNV Rules for Classification of Ships (Under 100m) • Models analyzed for loads transmitted to the deck through the SITS using FEA • These structural models create the complete “Minimum Ship” design • Potential VOOs can be compared to these minimum ships in order to quickly assess their suitability as a platform for the SRDRS 12/9/2008 SNAME Chesapeake Section 18 What is Classification? • Classification certifies adherence to a recognized set of technical standards • Represents that marine facilities possess the structural and mechanical integrity required for the intended service as represented by the “Class notation” • The classification process involves: – Establishing industry accepted standards known as “Rules” – Reviewing the designs against these standards – Ensuring that the equipment is built in accordance with the approved plans and maintained to these accepted standards during their entire life cycle • Marine facilities built to meet the requirements of the Rules are “Classed” 12/9/2008 SNAME Chesapeake Section 19 Who Provides Classification Services? • Classification services are offered by independent third-party organizations known as “Classification Societies” • Major Classification Societies include: – American Bureau of Shipping (ABS) – Lloyd’s Register of Shipping (LRS) – Det Norske Veritas (DNV) – Germanischer Lloyd (GL) 12/9/2008 SNAME Chesapeake Section 20 Application of Classification to SRDRS • ABS is working with the U.S. Navy to support the development, deployment, and operation of SRDRS • Areas of involvement include: – Classification of several elements, including the Launch and Recovery System (LARS), Deck Cradle, Umbilical Handling System, and Ship Interface Template Sets (SITS) – Third-party independent design review and survey services for the pressure hull and Transfer Skirt of the Pressurized Rescue Module System (PRMS) – Development of the “minimum ship methodology” for VOOs – Survey support during deployment of SRDRS 12/9/2008 SNAME Chesapeake Section 21 Paradigm Shift for Navy Certification • U.S. Navy Deep Submergence Systems traditionally certified to System Certification Procedures and Critieria Manual for Deep Submergence Systems (“P-9290”) – Appendix H allows for Handling System certification by ABS in lieu of NAVSEA • Advantages of ABS Classification: – On-site survey during construction (no SUPSHIP present at any SRDRS contractor sites) – ABS Rules are modified more frequently and more quickly than P-9290 and other applicable Navy standards – Time and cost savings during operations and maintenance over entire SRDRS life-cycle due to worldwide ABS presence • Additional benefit discovered – leverage ABS experience with potential VOOs to support time-critical rescue operations with 24/7 emergency response 12/9/2008 SNAME Chesapeake Section 22 Interface and Cooperation • Unique nature of SRDRS certification required development of additional guidelines above P-9290 and ABS Rules • NAVSEA-ABS Memorandum of Agreement – Provides procedures for: • Initial certification of components • Sustaining certification of components • Installation certification and deployment authorization of SRDRS aboard a VOO • “ABS-Plus” Requirements – Tailoring of existing Navy standards or modification of ABS Rules as agreed to by NAVSEA and ABS 12/9/2008 SNAME Chesapeake Section 23
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