Accession Number:

AD0022747

Title:

PROGRESS REPT. 1 JULY-30 SEPTEMBER 1953 (HARBOR PROTECTION PROJECT) ON CONTRACT NO. NONR-609(02) (YALE UNIV)

Descriptive Note:

Corporate Author:

YALE UNIV NEW HAVEN CT LAB OF MARINE PHYSICS

Personal Author(s):

Report Date:

1953-09-01

Pagination or Media Count:

31.0

Abstract:

Mine-spotting tests with the temporary X-band radar showed that mine splashes are easily detected and that low-flying planes and falling mines are trackable in some cases. Sound-ranging tests showed that the low-frequency component of long duration, which always follows a mine splash, is also observed when the mine is dropped from rest while wholly submerged. Progress is reported on the medium-range and short-range location of planted mines. Tests of Raydist equipment indicated that much lighter gear perhaps a set designed for helicopters would be more suitable for small boat work. Laboratory tests on inducing vortex flow by towing suitably shaped baffles indicated the feasibility of this method as a means of pressure mine sweeping. The special television chain for the underwater identification of mines operated satisfactorily. See also AD-14400, Secret UNITERMS Harbors, Protection, Defense, Systems, Radar, Mines, Spotting, Photographic, Visual, Sonar, Countermeasures, Vessels, Navigation, Minesweepers, Pressure, Sweeping, Location.

Descriptors:

• *MINESWEEPING
• *HARBOR DEFENSE SYSTEMS
• RADAR
• LABORATORY TESTS
• TELEVISION SYSTEMS
• IDENTIFICATION
• HELICOPTERS
• NAVIGATION
• BOATS
• SONAR
• LOW FREQUENCY
• X BAND
• HARBORS
• COUNTERMEASURES
• SPLASH
• UNDERWATER MINES
• MINES(ORDNANCE)
• BAFFLES
• MINESWEEPERS
• VORTICES

Subject Categories:

• Undersea and Antisubmarine Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE