The amount the top of the side shell slopes back

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Unformatted text preview: when the ships are being docked 2/ tow barges by pulling them with a cable in the ocean 3/ Tumble Home ----An inboard slant of a ship's side above the bilge. The amount the top of the side shell slopes back toward the centerline between the point of widest breadth and the deck at side (see Fig. 3) Tow Knees. Tractor propulsion ----A system of vertical blades used to propel a vessel in the water. Used on some harbor tugs and ferries. Made by Volith. Sometimes called a cyclonic system in E6002 – Ship Terms & Definitions p. 21 © C.G.Daley U Ullage Hatch ---- A small hinged opening on a tank for gauging or sampling cargo. The ullage is the distance from the top of this hatch to the top of the cargo. It is the 'opposite' of innage. Ullage hatch used for gauging the ullage or innage of a cargo. Uptake ----Connection between boilers and smokestack. V Vapor Header ----A pipeline connected to the top of a cargo tank that channels the displaced tank vapors to a shoreside control system. Vertical Keel ----A row of vertical plates extending along the center of the flat plate keel. It sometimes is called the center keelson. Voice Tube ----A large speaking tube that goes from one operating station to another. Very effective. Void Tank ----A watertight space that does not carry ballast or cargo. For floatation. W Water Line ----Any one of certain lines of a ship parallel with (and at various heights above) the base line. In half-breadth plans the waterlines are smooth curves showing the shape of the ship; in profile plans they a re projected as straight lines The intersection of the moulded surface with a horizontal plane at a given height above the base line. The six foot water line is exactly six feet higher than the base line. These intersections are shown in the half breadth plan in the lines drawing. They should not be confused with the "load line" marked on the outside of a ship when built. Ship fitters use a waterline merely as a height above the base line and in this sense waterlines are marked on bulkheads, frames, and other members, for the purpose of properly setting and aligning the structure. Watertight ----So riveted, caulked, or welded as to prevent the passage of water. Waterway ----A narrow passage along the edge of a deck for drainage. A gutter. Ways ----Timbers, etc., on which a ship is built or launched. (See Launching.) Weather Deck ----A deck exposed to the weather. Web ----The vertical portion of a beam, the athwartship portion of a frame, etc. Web Frame ----A frame with a deep web. Welding ----Fusing together two or more members with electric arc or by other means. Well ---- A cofferdam or a sump in the double bottom. Wheel ----Nickname for propeller; steering gear control. Winch ----A small hoisting device; used in pulling lines or cables in handling cargo. Can be hand, air motor, electric, steam, engine, etc... powered. Windlass ----A machine used to hoist the anchors by winding in the anchor chain. Wind Scoop ----A device used to divert air into a compartment of a ship. E6002 – Ship Terms & Definitions © C.G.Daley Z Zee-bar ----A structural shape with a cross section resembling the letter Z. Reference: Disclaimer on web site: “Hank Hilliard did not author this article, nor did he draw the illustrations. He does not know who did. There was no name on the pages to identify the author or when it was written. The pages were old and somewhat yellowed, indicating a document that has been around for sometime. My theory is that it is in the public domain. The concepts seem to be current enough. It is presented here for the purpose of education. I have added to the definitions where I believe I have some authority. Please contact me if you can add to this document.” p. 22...
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