If, however, there is a collision in open waters, it is generally a more serious matter. Electronic nautical charts are essentially based on the large-scale charts used in professional shipping and are therefore not ideally suited for navigating in tight spaces. • When using electronic nautical charts, allow for inaccuracies. • Regularly correct and update nautical charts. A Question of PerspectiveOn small displays in particular, the use of the zoom function is indispensable in electronic navigation.