1. A position locating apparatus ( 10 ; 48 ), for use with a traditional map ( 46 ) having its own co-ordinate system distinct from a wide-area co-ordinate system and for use with conversion data associated with the map from which the relationship between the map co-ordinate system and the wide-area co-ordinate system can be determined, the apparatus comprising: means ( 18 ) for receiving the conversion data; means ( 14, 30 ) for receiving transmissions from a wide-area position transmitting system and determining therefrom the current position of the transmission receiving means in terms of the wide-area co-ordinate system; means ( 28 ) for processing the current wide-area co-ordinate position and the conversion data to determine the current position in terms of the map co-ordinate system; and means ( 24, 26 ) for annunciating to a user the current map co-ordinate position; characterised in that: the processing means is operable to determine the current map co-ordinate position as a coarse position relative to the map and a fine position relative to the coarse position; and the annunciating means comprises means ( 24 ) for annunciating the coarse position and means ( 26 ) for annunciating the fine position.