Abstract: Automatic control system for the turn of a boat equipped with two propulsive lines, each line comprising a propulsion device (6a, 7a), an engine (4, 5), a reversal device (6, 7), and a control hand lever (1, 2) suitable to generate a forward gear request signal (8), a reverse gear request signal (9), and a boat acceleration request signal (10). The system further comprises devices generating a turn request signal (15) and a control unit (3) for the above-mentioned engines (4, 5) which is arranged to acquire the signals (8-10) from the control hand levers (1, 2) and the turn request signal (15), and arranged to generate, as a function of said signals (8-10, 15), two virtual speed signals (17, 18) indicative of the thrust to be developed by the propulsive devices (6a, 7a).

Abstract: Two fuel tanks are situated on opposite sides of the central longitudinal axis of a boat. An inclinometer generates electric signals indicating the inclination of the boat about its longitudinal axis. The two tanks are connected hydraulically by at least one pipe with which a pump is associated. An electronic processing and control unit acquires and processes the signals emitted by the inclinometer and operates the pump, depending on said signals, so as to transfer fuel from one tank to another in order to reduce the inclination of the boat.

Abstract: Two fuel tanks are situated on opposite sides of the central longitudinal axis of a boat. An inclinometer generates electric signals indicating the inclination of the boat about its longitudinal axis. The two tanks are connected hydraulically by at least one pipe with which a pump is associated. An electronic processing and control unit acquires and processes the signals emitted by the inclinometer and operates the pump, depending on said signals, so as to transfer fuel from one tank to another in order to reduce the inclination of the boat.

Abstract: The apparatus includes transmitter-receiver units (10, 20) for emitting acoustic signals in the form of beams (F1, F2) directed rearwardly of the stern and for receiving acoustic signals reflected by the fixed structure (B, C). The number of transmitter-receivers and the beam angles of the respective beams are determined so as to include substantially the entire area behind the stern in their field of view. Each transmitter-receiver includes a transducer for converting input electrical signals into output acoustic signals and for converting reflected acoustic signals into output electrical signals which are supplied to an electronic processor unit. On the basis of electrical input and output signals, the processor unit determines the instantaneous distance between the vessel and the fixed structure. A visual and/or acoustic signalling device is connected to the processor unit for emitting a visual and/or acoustic signal in real time indicating the instantaneous distance determined.

Abstract: The apparatus includes transmitter-receiver units (10, 20) for emitting acoustic signals in the form of beams (F1, F2) directed rearwardly of the stern and for receiving acoustic signals reflected by the fixed structure (B, C). The number of transmitter-receivers and the beam angles of the respective beams are determined so as to include substantially the entire area behind the stern in their field of view. Each transmitter-receiver includes a transducer for converting input electrical signals into output acoustic signals and for converting reflected acoustic signals into output electrical signals which are supplied to an electronic processor unit.