This five day course covers all the basic, theoretical and practical knowledge required in the NI training program, phase one. It is aimed at navigators and other users of DP systems with limited or no DP experience, but is also suitable for other persons who would like to have a better basic understanding of the DP system. The training consists of theoretical lessons, as well as practical exercises and demonstrations. Each of the students will have considerable hands-on training on their own DP operator station, using standard SDP software. After the course the student should be ready for phase two in the NI training program, consisting of 30 days of practical experience.