Universidad Nacional Experimental Marítima del Caribe Vicerrectorado Académico Coordinación de Idiomas English VI. Maritime Engineering

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1 Universidad Nacional Experimental Marítima del Caribe Vicerrectorado Académico Coordinación de Idiomas English VI. Maritime Engineering Marine facilities Unit V. Auxiliary machinery Speaking and writing. What do you know about auxiliary machinery? Do you know what it includes? All marine machinery falls under two heads: that which is responsible for the driving of the ship's propeller, and that which supplies the requirements of the machinery. Auxiliary machinery All machinery and devices which form the nonpropulsive equipment is auxiliary machinery. It is used to serve the main engine and the necessities of the ship. It includes diesel generator, a boiler, a refrigerating installation, compressors, separators, evaporators, pumps and other units to carry out a number of functions.

2 Reading and writing. Read the functions of the auxiliary machinery provided in the box below. To moor the ship and handle cargo To provide for safety To apply the main power of the engines To supply the ship with electric power and lighting To supply the needs of the main engines and boilers To supply domestic needs To keep the ship dry and trimmed Now, write these functions in the corresponding paragraph in the following article. The functions of the auxiliary machinery may be summarized as follows.. Air compressors are used to supply compressed air for starting engines. Coolers are used for cooling either oil or water. Water for the boilers is also heated before being admitted into the boiler by feed water heaters. This increases the efficiency of the boiler.. This is done through the bilge and ballast piping systems. The former removes water which has gathered in machinery, cargo and other spaces. The latter pumps water into and out of ballast tanks. In general cargo ships, these systems are usually interconnected and served by the same pumps. In tankers and other bulk carriers, these systems are entirely separate, because these ships may need to ballast at 12,000 tons/hour and therefore need larger pumps. such as fresh water from distillation plant, sanitation from sewage plant and heating and ventilation from heaters and air conditioners. for propulsion and maneuvering. The engine power is transmitted to the propeller by a line of steel shafting. This is made up of the thrust shaft, intermediate shafts and the propeller shaft. Steering gear is also necessary to operate the rudder for maneuvering.. This is done by steam or diesel power generators.. Deck machinery is extensive and varied. It can be divided into anchor handling machinery - windlass and capstans, mooring machinery - winches and capstans and cargo handling machinery - winches and cranes. It also includes cargo oil pumps.. Firefighting and fire detection equipment, lifeboat engines and launching gear are also included.

3 No type of machinery fitted to a ship, is self-sufficient. In addition to the large number of auxiliaries needed for the operation of the main machinery, most of which are now operated electrically, electricity is playing such an important part in shipboard life to-day, that, even if it is needed for every other purpose requiring mechanical operation. Therefore, all ships have power-generating stations. Check the answers with your partners. Read the article again and write TRUE or FALSE. 1. The bilge piping system removes water which has gathered in machinery, cargo and other spaces. 2. Both bilge and ballast piping systems are separate in some ships, such as the tanker and some bulk carriers. 3. The propeller is made up of the thrust shaft, intermediate shafts and the propeller shaft. 4. Deck machinery is divided into anchor handling machinery and cargo handling machinery. Vocabulary Read the explanations of these terms and write them in the corresponding definition. Rudder used for maneuvering the ship. Ballast regulates and improves the ship s stability. Trim has to do with the stability of the vessel. Thruster has to do with power for maneuvering the ship The condition of a vessel that is loaded and balanced properly so that she floats correctly on her waterline. A submerged plane mounted astern for steering a vessel. An auxiliary motor and propeller usually mounted athwartships at the bow to maneuver the ship sideways. Heavy weights (sometimes seawater) installed deep in the hull to adjust the draft of a ship and improve stability.

4 Match the terms in the box with the definitions given below. boiler pump shaft - shafting - propeller shaft - thrust shaft - intermediate shaft bilge device windlass capstan - sewage plant 1) A special form of winch used to hoist anchors, house them safely and warp the ship when in harbor 2) Bar or rod joining parts of a machine or transmitting power 3) The lower internal part of the hull adjacent to the keelson where the water collects 4) The medium by which the motion of the engines is transmitted to the propeller screws 5) A machine used on board a ship for rising anchor, lifting heavy weights or any other similar work 6) The aftermost section of shafting which carries the propeller 7) A machine (device) for forcing liquid, gas or air into, out of or through something 8) One of the lengths of main drive shafts between the thrust bearing and the propeller shafts 9) An installation for treatment or disposal of waste 10) Metal container in which water, etc. is heated 11) The length of shafting which transmits the thrust of the propeller to the thrust bearing 12) Something invented or adapted for a special purpose

5 Fill in the blanks. 1. All ship machinery can be divided into main and machinery. 2. Ballast piping system pumps water into and out of. 3. The auxiliary machinery is used to serve and the necessities of the ship. 4. The engine power is transmitted to the propeller by. 5. Coolers are used for _ either oil or water. 6. Deck machinery is divided into machinery, machinery and machinery. 7. Bilge piping system removes water from machinery, and other spaces. Read the text again and answer the following questions. 1. What two groups is all marine machinery divided into? 2. What is auxiliary machinery used for? 3. What are the main functions of auxiliaries? 4. Why do all ships have power-generating stations? "...If the wheelhouse is the brain of the ship, the engine room may be called the heart of the ship". W. Somerset Maugham "Mister Know-All" Visit this site: