Accession Number:

AD0745379

Title:

An Experimental Analysis of the Dynamics of a Submerged Tethered Cradle.

Descriptive Note:

Technical rept.,

Corporate Author:

WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS

Personal Author(s):

• Cohen,Jay Martin

Report Date:

1972-06-01

Pagination or Media Count:

73.0

Abstract:

Submerged recovery of small submersibles by means of surface tethered platforms offers the possibility of operations in sea states higher than is now possible using surface recovery means. The Woods Hole Oceanographic Institutions submersible support catamaran LULU has such a tethered system. The system consisting of cradle, chains, and hoist is designed to recover DSRV ALVIN at a depth of 100 feet, and then lift the submersible rapidly through the air-sea interface. A 140 scale model of the catamaran, chain and cradle was constructed to investigate cradle heave and pitch response in regular sinusoidal waves. Model tests were conducted at the Massachusetts Institute of Technology Tow Tank Facility and data was recorded electronically and photographically. Author

Descriptors:

• *UNDERWATER VEHICLES
• RECOVERY
• CATAMARANS
• HOISTS
• STRUCTURAL COMPONENTS
• SHIP MODELS
• MODEL TESTS
• OCEAN WAVES
• INTERACTIONS

Subject Categories:

• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE