Key words: Simulator, RADAR, ARPA, ECDIS, OOW, COLREGS 1972, STCW 1995 Abstract The International Regulations for Preventing Collisions at Sea 1972 (COLREGS) are published by the International Maritime Organization (IMO), and set out the "rules of the road" to be followed by ships and other vessels at sea. COLREGS can also refer to the specific political line that divides inland waterways (subject to one set of navigation rules) and coastal waterways (subject to international navigation rules). Part B - Steering and sailing, Section I (for any visibility), Rule no. 5 about Look-out that every vessel must at all times keep a proper look-out by sight (day shape or lights by eyes or visual aids), hearing (sound signal or Marine VHF radio ) and all available means (e.g. Radar , ARPA , AIS , GMDSS ...) in order to judge if risk of collision exists. Rule no.7 Risk of Collision that Vessels must use all available means to determine the risk of a collision , including the use of ra