What happens when two COLREGs give you conflicting orders? This is the ultimate test of a navigator's knowledge. The Scenario: You are being overtaken by another vessel. According to Rule 13, you are the stand-on vessel, and your primary duty is to maintain your course and speed. The Conflict: ...But the vessel overtaking you is displaying the lights for a vessel Not Under Command. According to Rule 18, you are now required to keep out of her way. So, who gives way? The overtaking vessel, as per