A method for determining the position and/or orientation of a creature (3) relative to an environment by connecting the creature (3) to a locating member (4) including a transducer (5) so that the relative positions and/or orientations of the creature (3) and the transducer (5) are arranged to be within a limited interval. The transducer determines its position and/or orientation relative to the environment by receiving incident signals from the signal sources (9) in the environment, and the position and/or orientation of the creature (3) is determined by the position and/or orientation determined for the transducer (5).