Pitch and Depth Keeping of Moored-type Underwater Acoustic Array System

This paper introduces the operation method of KAAS (KRISO acoustic array system) developed in South Korea. KAAS is a moored-type underwater acoustic array system for the research of signal processing technology that uses array sensors to detect and classify underwater sound sources and targets. The underwater platform with the hydrophone array and the acoustic projector should be kept horizontal during signal transmission and reception. For this, the weathervaning mooring method and the stabilizers are applied to maintain the horizontal even keel of platform without a propulsion system. And the buoyancy control units are equipped to control the total buoyancy and the horizontal balance. In the weathervaning mooring method, the effects of the current on the platform are analyzed and the results from varying the length of the mooring cable are simulated. The results of comparative analysis of simulations and pier test are discussed.