Rules of the Air Article 27

When two aircraft or an aircraft and a vessel are approaching one another and there is a risk of collision, the aircraft shall proceed with careful regard to existing circumstances and conditions including the limitations of the respective craft.1. Converging: An aircraft which has another aircraft or a vessel on its right shall give way so as to keep well clear.2. Approaching head-on: An aircraft approaching another aircraft or a vessel head-on, or approximately so, shall alter its heading to the right to keep well clear.3. Overtaking: The aircraft or vessel which is being overtaken has the right-of-way, and the one overtaking shall alter its heading to keep well clear.4. Landing and taking off: Aircraft landing on or taking off from the water shall, in so far as practicable, keep well clear of all vessels and avoid impeding their navigation.