To make a player able to comfortably play and to make an operation manager able to perform the operation management of a course and a cart at a glance by providing a radio unit capable of transmitting a present position coordinate point measured by a GPS circuit and transformed by a coordinate point transformation circuit to the master unit of a club house by radio waves and performing voice communication.

The present position coordinate point and transmission radio waves from a slave unit are received by an antenna 28 for transmission and reception and transmitted to a specified radio equipment 29. Present position coordinate point signals from the specified radio equipment 29 are transmitted to an undividual judgement circuit 30, and as a result, from what number of the cart the signals are transmitted is discriminated, and the discrimination signals are transmitted to the coordinate point transformation circuit 31. On a monitor screen 32, map signals are transmitted from a course drawing coordinate point software 33 to a monitor display circuit 34 and a course drawing is displayed on the monitor screen 32. Then, the present position coordinate point signals from the coordinate point transformation circuit 31 are transmitted to the monitor display circuit 34, a cart position 15 displayed by a cart number on the course drawing of the monitor screen 32 and what number of the cart is present where, is recognized at a glance.