This position paper outlines design ideas gained from a project dealing with different interaction concepts when designing a computer based navigation systems for truck drivers working over large areas and where the delivery and pick-up points from time to time are unfamiliar to the driver. The extension of this previous project includes more `untraditional' technology, but has the same approach and uses the same basic concepts. Both the original design and the new design are based on an empirical study of truck drivers work practice.