Control system of marine vessel and portable device for marine vessel

A control system of a marine vessel, the control system comprising:

• a portable device including a battery switch operator and that transmits an authentication signal that is a wireless signal including a lock signal to perform a lock control to lock at least a portion of the marine vessel and an unlock signal to perform an unlock control to unlock the lock control based on a locking and unlocking input operation on the battery switch operator;
• and
• a receiving device disposed on the marine vessel and that receives the authentication signal from the portable device;
• wherein
• the battery switch operator receives an opening and closing input operation that is different from the locking and unlocking input operation to open or close a current path between an engine controller that controls operation of an engine of the marine vessel and a battery;
• the portable device transmits a switch control signal, which is a wireless signal to open or close the current path, to the receiving device based on the opening and closing input operation on the battery switch operator;
• and
• the control system performs the lock control and the unlock control based on the authentication signal from the portable device, and controls the opening or closing of the current path based on the switch control signal from the portable device.