“I have a diver down; keep well clear at slow speed, I am taking in or discharging or carrying dangerous goods, affirmative, stay clear of me; I am manoeuvring with difficulty, I am disabled; communicate with me, I am altering my course to starboard, I wish to communicate with you, I am on fire and have dangerous cargo on board: keep well clear of me, my vessel is stopped and making no way through the water are some of the most common ones. These have a particular flag for each of the signals that are easy to identify.