An operation apparatus configured to operate a ship propulsion machine includes: a remote control device including a holder and an operation lever swingably supported, and configured to perform a shift switching operation of the ship propulsion machine and an operation of increasing/decreasing a rotation speed of a power source of the ship propulsion machine; a gauge device including a display device and configured to display information regarding the ship propulsion machine including information indicating a shift position of the ship propulsion machine and the rotation speed of the power source; and a case to which the remote control device and the gauge device are each attached, and which integrates the remote control device and the gauge device. In the case, the remote control device and the gauge device are disposed adjacently to each other in a front-rear direction of the ship.

A trolling motor mounting bracket (1) which can be adjustably attached to a boat by a quick release handle (14) having pins (18) inserted through a chock (20) attached to the boat. The bracket has a support arm (4) with cradle rest (11) for supporting a shaft (18) of a trolling motor (6). The support arm be attached to the bracket by a hinge (10) which may have a spring that can be adjusted by a set screw (33) to increase resistance in the trolling motor support arm. A recessed cavity (24) in a base (31) of the bracket allows the bracket to be positioned variably on the chock.

The present invention is directed to a mounting device for a fish finding apparatus and, more particularly, to a motorized mounting device which includes an adjustable length pole used to mount a sonar transducer or other device an angler may be interested in mounting to the end of the pole that enters the water. The pole is used to spin the transducer or other apparatus in a clockwise and counterclockwise direction with a switch that is adapted to be operated by the angler's foot or a wireless remote. The mounting device is configured to be secured to a boat or mounted on a boat troll motor whereby the adjustable pole is secured and spins independent of the troll motor shaft.

The invention provides a marine drive unit (1), such as an outboard motor, for a marine vessel, comprising: an engine or power plant (E), such as an internal combustion; a drive transmission for transmitting or transferring mechanical power generated by the engine or power plant (E) to a propeller shaft for generating propulsion for the vessel; a casing (3) that houses or at least partially encloses the engine (E) and/or the drive transmission; a mounting assembly (2) configured to mount the marine drive unit (1) to a hull, preferably to a transom, of the marine vessel; and a gyrostabiliser (4) arranged in or on the mounting assembly (2) or the casing (3). As an alternative to an outboard motor, the marine drive unit (1) may be provided as a stern drive unit or a pod drive unit. The invention also provides a marine vessel incorporating such a drive unit (1).

A trolling motor is provided for attachment to a watercraft. The trolling motor includes a system for steering and trimming a trolling motor. The system includes a trolling motor shaft attachment feature configured to receive and rotate with a trolling motor shaft about a trolling motor shaft axis. The system further includes a steering system having a steering motor configured to rotate the shaft attachment feature and shaft to steer a facing direction of the trolling motor. The trim system includes a trim module having a trim motor configured to cause the trolling motor shaft to raise or lower with respect to the steering system so as to cause the trolling motor to raise or lower with respect to the watercraft. The trim module is disposed on the shaft attachment feature such that the trim module rotates with the trolling motor shaft attachment feature about the shaft axis.

Constant-speed-travel-apparatus controlling prime-mover so that mobile-body mounted with the prime-mover travels at constant-speed, includes: function-operation-member being instructed activation of speed-maintaining-function of the mobile-body in response to operation by operator; first-speed-operation-member being instructed the travel-speed of the mobile-body in accordance with operation-amount by the operator; second-speed-operation-member being instructed change of the travel-speed by predetermined amount in response to operation by the operator in state where activation of the speed-maintaining-function has been instructed through the function-operation-member; and electronic-control-unit controlling output of the prime-mover based on the operation-amount of the first-speed-operation-member and number of times of operation of the second-speed-operation-member so that the mobile-body travels at constant-speed in the state. The electronic-control-unit deactivates the speed-maintaining-function and controls the output of the prime-mover based on the travel-speed instructed through the first-speed-operation-member when the operation-amount of the first-speed-operation-member exceeds predetermined operation-amount in the state.

Constant-speed-travel-apparatus controlling prime-mover so that mobile-body mounted with the prime-mover travels at constant-speed, includes: function-operation-member being instructed activation of speed-maintaining-function of the mobile-body in response to operation by operator; first-speed-operation-member being instructed the travel-speed of the mobile-body in accordance with operation-amount by the operator; second-speed-operation-member being instructed change of the travel-speed by predetermined amount in response to operation by the operator in state where activation of the speed-maintaining-function has been instructed through the function-operation-member; and electronic-control-unit controlling output of the prime-mover based on the operation-amount of the first-speed-operation-member and number of times of operation of the second-speed-operation-member so that the mobile-body travels at constant-speed in the state. The electronic-control-unit deactivates the speed-maintaining-function and controls the output of the prime-mover based on the travel-speed instructed through the first-speed-operation-member when the operation-amount of the first-speed-operation-member exceeds predetermined operation-amount in the state.

A device and a method for controlling an electrical steering system in a marine vessel comprising at least one steerable propulsion unit, the electrical steering system comprising a main steering system (220; 220.1) that comprises a main electric motor (221; 221.1) and a main power source, e.g. a main battery (229; 229.1); a main steering angle sensor (226; 226.1) arranged to detect the steering angle of the propulsion unit; a main control unit (240; 240.1) arranged to steer the propulsion unit and to monitor the main steering system status; an auxiliary steering system comprising an auxiliary electric motor (231; 231.1) and an auxiliary battery (239; 239.1); and an auxiliary clutch (232; 232.1) arranged to connect a drive shaft of the auxiliary electric motor to the input shaft of the steering transmission (223; 223.1). The method involves the steps of engaging the auxiliary clutch at start-up of the propulsion unit; performing a diagnostic test of the main steering system during start-up; performing a calibration of an auxiliary steering angle sensor; and disengaging the auxiliary clutch upon completion of the diagnostic test.

The invention relates to an arrangement for measuring salinity in water, which arrangement is part of an impressed current cathodic protection system having an electrical circuit comprising a source of electrical power (310); at least one first electrode (315) connected to a positive pole of the power source (310); at least one second electrode (317) connected to a negative pole of the power source (310); a voltage sensor (341); a current sensor (342); and a control unit (313). The control unit is arranged to initiate a measurement sequence at predetermined intervals, wherein the control unit is arranged to connect at least one first electrode (315) to the negative pole of the power source (310) to act as a cathode; connect at least one passive electrode (326) to the positive pole of the power source (310) to act as an active anode; register the output voltage; register the current; determine the circuit resistance using the output voltage and the current; and calculate the resistivity of the electrolyte based on the determined circuit resistance and at least one stored electrode property value, which resistivity is inversely proportional to the salinity. The invention further relates to a vessel provided with such a measuring arrangement and a method for its operation.

A marine propulsion device is provided. The device includes an engine, a driveshaft that is caused to rotate by the engine, a cowling system, a gearcase that supports a propulsor for imparting a propulsive force in a body of water, and a cooling water circuit that conveys cooling water that exchanges heat with the engine. The cooling water circuit includes an engine dump hose that extends from a first end to a second end. The first end is coupled to a cooling water outlet of the engine. The cooling water circuit further includes an egress component configured to discharge the cooling water from the device along a discharge trajectory parallel to a plane that bisects the device into a port side and a starboard side. The egress component extends through one or more components of the cowling system and is coupled to the second end of the engine dump hose.