TOWING TANKS , SEAKEEPING AND MANOEUVRING BASINS

MARINE DYNAMICS AND SHIP LABORATORY, CANADA NATIONAL RESEARCH COUNCIL, Bldg . M-22, OTTAWA, ONTARIO., K1A OR6. (613) 993-2288 Telex 053-3386

TOWING TANKS , SEAKEEPING AND MANOEUVRING BASINS

DESCRIPTION OF CARRIAGES: outdoor basin, no carriages fitted

WAVE GENERATION CAPABILITY: regular, length 2-15 m, slope 1-10 deg. WAVEMAKER TYPE AND EXTENT: 8 synchronized pneumatic wavemakers on one 61 m side BEACH TYPE AMD LENGTH: 4 perforated panels on parabolic arc. 6 m WAVE MEASVREHENT: 8 fixed ultrasonic probes on struts 0.6 m below water surface equispaced across basin

INSTRUMENTATION : radio-controlled models with digital radio telemetry link to shore-based minicomputer data acquisition system. 30 channels at 25 samples/sec each all data recorded on digital magnetic tape MODEL SIZE RANGE: ship lengths from 3 to 4.5 m floating structures from 1 to 2 m diameter MODEL TRACKING TECHNIQUES : two telescopes automatically track light source on model and yaw gyro in model measures heading . minicomputer plots model track continuously duping tests. TESTS PERFORMED: (1) manoeuvring tests. (2) seakeeping and propulsion tests at all headings in long-crested waves. (3) motions and loads on moored ships and floating structures. (4) dynamic stability and capsizing tests.

PUBLISHED DESCRIPTION: 14th ITTC, 15th ATTC, NRC Report MB-251