DEVICE, METHOD, AND PROGRAM FOR NOTIFYING RETURN-TO-HARBOR INFORMATION

A return-to-harbor notifying device is provided, which may include a user interface and processing circuitry. The user interface may receive an information related to a planned time of arrival at a home harbor that is a location to which a ship returns. The processing circuitry may generate a traveling route upon returning to the harbor, calculate a required time for traveling from a current location of the ship to the home harbor based on the traveling route, calculate a return-to-harbor start time of the ship based on the required time and the information related to the planned time of arrival, and notify a content based on the return-to-harbor start time.