single-letter signals from ATP 1, volume II. These important and commonly used signals are as follows: SINGLE-LETTER SIGNALS WITH COMPLEMENTS A B* C* D* E* F G* H* I* J K L M N O P Q S* T* U V W X Y I have a diver down; keep well clear at slow speed. I am taking in, discharging, or carrying dangerous goods. Yes (Affirmative or "The significance of the previous group should be read in the affirmative.") Keep clear of me; I am maneuvering with difficulty. I am altering my course to starboard. I am disabled; communicate with me. I require a pilot. When made by fishing vessels operating in close proximity on the fishing grounds, it means "I am hauling nets.” I have a pilot on board. I am altering my course to port. I am on fire and have dangerous cargo on board, keep well clear of me. I wish to communicate with you. You should stop your vessel instantly. My vessel is stopped and making no way through the water. NO (Negative or "The significance of the previous group should be read in the negative.") This signal may be given only visually or by sound. For voice or radio transmission, the signal should be “NO.” Man overboard. In harbor—All persons should report on board as the vessel is about to proceed to sea. At sea—It may be used by fishing vessels to mean “My nets have come fast upon an obstruction.” My vessel is “healthy” and I request free pratique. My engines are going astern. Keep clear of me; I am engaged in pair trawling. You are running into danger. I require assistance. I require medical assistance. Stop carrying out your intentions and watch for my signals. I am dragging my anchor. Signals of letters marked by an asterisk (*), when made by sound, may only be made in compliance with the requirements of the International Regulations for Preventing Collisions at Sea. Signals K and S have special meanings as landing signals for small boats with crews or persons in distress. These signals can be transmitted by any method of signaling. A list of the single-letter signals with complements are listed below: R with one or more numerals AZIMUTH OR BEARING COURSE DATE A with three numerals C with three numerals D with two, four, or six numerals G with four or five numerals (the last two numerals denote minutes, and the rest, degrees) K with one numeral LONGITUDE COMMUNICATE ( I wish to communicate with you by (complement table 1)) LATITUDE L with four numerals (the first two numerals denote degrees, and the rest, minutes) DISTANCE in nautical miles SPEED in knots LOCAL TIME SPEED in kilometers per hour GMT S with one or more numerals T with four numerals (the first two numerals denote hours, and the rest, minutes) V with one or more numerals Z with four numerals (the first two numerals denote hours, and the rest, minutes GENERAL SIGNAL CODE LEARNING OBJECTIVES: List and explain 10 sections contained in the General Signal Code. Each section in the General Signal Code covers specific actions. For example, section 1, Distress- Emergency, ranges from abandon ship to search and rescue; and section 3, Aids to Navigation, ranges from course to water depth. The sections and their contents are as follows: 1. 2. 3. 4. DISTRESS—EMERGENCY CASUALTIES—DAMAGES AIDS TO NAVIGATION—NAVIGATION— HYDROGRAPHY MANEUVERS 6-10