PROGRESS REPT. 1 JULY-30 SEPTEMBER 1953 (HARBOR PROTECTION PROJECT) ON CONTRACT NO. NONR-609(02) (YALE UNIV)
YALE UNIV NEW HAVEN CT LAB OF MARINE PHYSICS
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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.
- Undersea and Antisubmarine Warfare