The International Regulations for Preventing Collisions at Sea 1972 (COLREGs) are a set of rules to avoid collisions at sea. However a study undertaken by Acar et al (2011) showed that almost 50% of seafarers disregard/ignore the COLREGs at sea. This is supported by recent MARS and MAIB case law (UK accident agencies), which indicate that many of the principles of collision avoidance are improperl ...