Transportation of goods at sea is common, and several national, as well as international, regulations are provided in that field. To prevent ships from colliding or grounding, different actors plays a part by monitoring the ships and make analysis on the traffic patterns. This takes places in real-time as well as on historic data. This project concerns ships navigating with dangerous goods in the Danish waters. The danger and cost of ships grounding with the seabed can have a huge impact, and therefore the use of pilots is important when requested. The different regulation and factors that plays a role when navigating in Danish waters are investigated, for an analysis to be performed. The analysis concerns whether ships have been in a critical situation, i.e. where the under keel clearance have been less than recommended. It is furthermore investigated if ships are using pilots when regulated and if there are any locations outside the regulated areas, where pilotage should be compulsory. The methods used in the project as well as the results, are discussed and evaluated in the last phase of the project.