Our e-learning course teaches and assesses COLREGs in-line with the IMO International regulations for preventing collisions at sea in an easy and user friendly manner with a clear interpretation and better understanding of the rules. The course demonstrates various situations between vessels and clearly explains which rules should be applied by the mariners. A number of scenarios are produced to show training in three main types of situation: crossing situation, overtaking situation and head-on situation which can take place at high seas, narrow channels and Traffic Separation Schemes.