United States, India, Italy, China, Spain, France, Russia, Brazil, Thailand. United States, United Kingdom, Italy, France, Canada, India, China, Japan, South Korea, Russia. United States, France, Russia, South Korea, Spain, Australia, United Kingdom. United States, Australia, Canada, China, Croatia, Denmark, Germany, India, Iran, Italy, Malaysia, Myanmar, Netherlands, New Zealand, Norway, Pakistan, Philippines, Romania, Russia, Singapore, South Africa, Spain, Turkey, Taiwan, United Kingdom. The earlier types of cruise missile submarines had to surface before launching their missiles but that problem has been fixed and they can now launch their missiles without being seen with the naked eye.Ĭountries using the different types of ships (this info might come to change): Type: They have extreme firepower, for instance, the cruise missile submarine class Ohio can launch 154 cruise missiles without refuelling nor re-arming. In the example at the beginning (4–95–3–M), the compartment identified is on the fourth deck, is at the 95th frame, is the second compartment outboard from the ship’s centerline on the starboard side, and is a magazine or some other ammunition-related space.A cruise missile submarine is a submarine that can launch cruise missiles (SLCMs). The last part of the bullseye is a letter, or pair of letters, that tells you what the space is used for. If a space straddles the centerline, it has a zero as its third number. Similarly, the second compartment on the port side would have the number “4,” the third compartment on the port side would be “6,” and so on. This means that a compartment with the number “3” in this position on the bullseye would be the second compartment outboard from the centerline (“1” being the first) on the starboard side. Compartments with even numbers are on the port side (left as you look forward) of the centerline odd numbers are on the starboard (right, looking forward) of the centerline. The bigger the number, the farther away from the centerline ( outboard). The number tells you where you are in relation to that centerline. The third number of the bullseye is referenced to an imaginary line called the centerline, which runs from stem to stern, bisecting the ship into two long halves. Frame 150 in this case would be exactly amidships. If you know how many frames the ship has in total (say 300) and you are at frame 100, you know you are about one-third of the way aft in the ship (or two-thirds of the way forward). Frames are numbered, starting at the bow and increasing toward the stern-the farther aft you are, the higher the number of the frame. Plating is attached to these ribs to form the ship’s hull. Other beams, called frames, are attached to that backbone at regular intervals-roughly perpendicular ( athwartships) to it-like ribs to the human spine. Shipbuilders start construction of a vessel with its virtual backbone, called a keel, that essentially is a very large I-beam running from stem to stern. If a compartment extends through more than one deck (such as an engineering space that must be large enough to hold a reactor or huge turbines), its deck number refers to the space’s bottommost deck. The next one up is the 02 level, and so on. One level above the main deck is the 01 level. The first deck below the main deck is numbered “2,” the next one down is “3,” and so forth. These numbers increase as you move away from the main deck. All levels above the main deck are preceded by a zero (01, 02, etc.).All decks below the main deck are numbered higher than “1” (2, 3, etc.).Some important clues to deciphering this number system: These are indicated by the first number of the compartment identifier on the bullseye. The main deck is one of the references used in the compartment numbering system, and all the “floors” above the main deck are called levels and all below are called decks. Ships have a main deck, which generally is defined as the uppermost deck that extends from the stem (the very forward-most point of the ship) to the stern (the aftermost point). Letter(s)-code conveying the purpose of the compartment.Third number-compartment’s position relative to the centerline.For example: 4–95–3–M.įor each compartment, the numbers and letters will differ, but the format will not. It will have several lines of information, with the topmost line, made up of numbers and letters, providing location information. Each space in a Navy vessel has a unique identifier that consists of a yellow rectangle with black letters and numbers, known as the bullseye. Just as a town or city has a system using street signs and addresses to help you find your way around, so does a Navy ship.
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