Numer No 18/2011 [1] APPLICATION OF MARKOV CHAINS TO ANALYSE THE AIS AVAILABILITY Krzysztof Jaskólski [17] UNDERSTANDING INFORMATION SYSTEMS Krzysztof Pleskacz & Janusz Uriasz [27] ANALYSIS OF DIGITAL SEA BOTTOM MODELS GENERATED USING ENC DATA Ronan Dupuy & Artur Makar [37] THE USE OF SIMULATION METHODS TO DETERMINE THE MAXIMUM DIMENSIONS OF THE SHIP CAPABLE TO MANEUVRING ON THE SELECTED SEA AREA Krzysztof Czaplewski & Piotr Zwolan [45] COMPUTATION OF THE AZIMUTH OF THE GREAT CIRCLE IN CARTESIAN COORDINATES Andrzej Felski [55] USING THE SOFTWARE OF NAVI-TRAINER PRO 5000 SIMULATOR FOR ASSESSMENT OF THE DESIGNED NAVIGATIONAL INFRASTRUCTURE Krzysztof Czaplewski & Piotr Zwolan [69] METHODS TO GENERATE NUMERICAL MODELS OF TERRAIN FOR SPATIAL ENC PRESENTATION Roman Sassais & Artur Makar