Method for quasi-continuous transmission of hydroacoustic signals

The invention relates to a method for detecting slowly moving underwater objects on the basis of a temporally optimized transmitter / receiver use by quasi-continuous transmission of hydroacoustic signals. It consists of generating, transmitting, intercepting and evaluating a timed transmitter / receiver use by permanently emitting a signal pulsed according to a pattern and comprises the steps: Generating a carrier signal by means of a generator (3), Providing the optimal sequence by means of the code generator (4), Modulating the provided optimal sequence by means of transmit signal switches (5), Sending out the resulting signal sequence by means of transmitter (7), - collecting the reflected signal by means of a hydrophone (8), - Evaluate the received signal and - Controlling the transmission sequences (1), such that the reception sequences (2) by means of receiving signal switch (10), by means of evaluation (12) and by means of system coupling (11) via digital gates are influenced so that the reception sequences (2) not in the Transmission sequences (1) come to rest.