POSITION INFORMATION TRANSMISSION APPARATUS, POSITION INFORMATION TRANSMISSION SYSTEM, AND VEHICLE

A navigation device (200) serving as a position information transmission apparatus for transmitting position information about a vehicle (100) to a position information service center (500) includes a terminal ECU (210) that is authorized to log in to the position information service center (500) via networks (610) and (640). The terminal ECU (210) is configured to, in a logged-in state to the position information service center (500), transmit the position information about the vehicle (100) to the position information service center (500) on condition that a predetermined operation has been performed.