TIRIAL PRODUCTION OF FLOAT TYPE TOWED VEHICLES

Abstract

Float type towed vehicle is required for the field measurement of surface water quality distribution, especially in bay, estuary and other shallow stratified water body. The authors developed a new float type towed vehicle with a fin for submerging the body while running. The submerged body makes few bubbles which disturbs optical measurement; turbidity, chlorophyll, etc.
This paper represents the specification of this vehicle, characteristics of submergence and the comparison with the existent sinking type vehicle. The settings of fin angle, towing angle, length of towing rope and towing velocity define the submerging depth. The relationship between the velocity and the depth in some casesare clarified. Suitable settings for the measurement in required depth can be defined from it. This towing vehicle is more stable in constant depth than the existent vehicle.