Appendix XI

ALVIN / SEA CLIFF Proposal

Introduction

• Decommissioning SEA CLIFF - loss of US manned 6000 m science capability
• Strong support for continued manned presence to 6000 m
• SEA CLIFF too large, heavy, expensive for science community
• Important to retain resident capabilities of ALVIN

  Engineering Study for a Replacement U.S. 6000-meter Manned Research Submersible
WHOI/DSG-  June 1998

• Design of MIRs and NAUTILE indicate 18,000 lb savings compared to SEA CLIFF
• Transfer of SEA CLIFF offers:
• 6000 m Ti sphere
• valuable 6000 m syntatic
• advanced VB system
• updated CTFM sonar system
• Review importance of viewport location from both science and engineering perspectives

• GOAL
• Best method for obtaining 6000 m manned submersible with improved capability and reliability
• Develop design, capability, and cost matrix
• Determine best utilization of SEA CLIFF assets
 
 
• METHODS
• Evalutate other 6000m submersibles
• Study options with regard to spheres/viewport locations
• Literature search/ industry dialog concerning new technology
• Consider design review and certification issues
 
• REPORT
• Cost and engineering analysis to facilitate evaluation of feasible options
• Recommendation for optimum path to effective, reliable, and affordable 6000m manned submersible