Unit 12 Lifeboat Construction

Unit 12 Lifeboat Construction - Vessel Familiarization...

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Unformatted text preview: Vessel Familiarization & Basic Safety Training (MT1111) Unit 12 Lifeboat Construction & Design Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 2 Lifeboat Construction & Design Unit Learning Objectives 1. Explain and describe the construction and design of survival craft and rescue boats. 2. Describe and demonstrate survival craft and rescue boat fittings and appurtenances. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 3 Lifeboat Construction & Design 46 CFR 160.0352 General requirements for lifeboats. (a) The requirements of this subpart apply to all new construction. Lifeboats approved and in use prior to the regulations in this subpart may be continued in service if in satisfactory condition. (b) All lifeboats must be properly constructed and shall be of such form and proportions that they shall be readily maneuverable, have ample stability in a seaway, and sufficient freeboard when fully loaded with their full complement of persons and equipment. All lifeboats shall be capable of maintaining positive stability when open to the sea and loaded with their full complement of persons and equipment. All lifeboats must be open boats with rigid sides having internal buoyancy only. Lifeboats with a rigid shelter may be approved, provided that it may be readily opened from both inside and outside, and does not impede rapid embarkation and disembarkation or the launching and handling of the lifeboat. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 4 Lifeboat Construction & Design (c) Lifeboats may be constructed of steel, aluminum, fibrous glass reinforced plastic (FRP), or other materials receiving specific approval: Provided, That, the weight of the fully equipped and loaded lifeboat shall not exceed 44,800 pounds, and the carrying capacity calculated in accordance with 160.0359 of this specification shall not exceed 150 persons. (1) The thwarts, side benches and footings of lifeboats shall be painted or otherwise colored international orange in accordance with Federal Specification TTP59. The area in way of the red mechanical disengaging gear control lever, from the keel to the side bench, shall be painted or otherwise colored white, to provide a contrasting background for the lever. This band of white should be approximately 12 inches wide depending on the internal arrangements of the lifeboat. (d) For the purpose of calculations and conducting tests, the weight of the persons shall be taken at 165 pounds each. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 5 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 6 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 7 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 8 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 9 Lifeboat Construction & Design Hand-propelled Lifeboat (Viewed from above) Illustration Diagram D011SA ITEM No. 1 No. 2 No. 3 No. 4 No. 5 No. 6 No. 7 DESCRIPTION ITEM Hand propelling levers No. 8 Thwart No. 9 Bracket No. 10 Grab rail No. 11 Floor No. 12 Keel (bar keel) No. 13 Limber hole No. 14 DESCRIPTION Footings Releasing gear rod Stanchion Gunwale Side bench Tank (air) Tank (air) 10 Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) Lifeboat Construction & Design Hand-propelled Lifeboat (Viewed from above) Illustration Diagram D010SA ITEM No. 1 No. 2 No. 3 No. 4 No. 5 No. 6 DESCRIPTION Row lock sockets Bresthook Bow sheet Foot rest Gunwale Bilge pump ITEM No. 7 No. 8 No. 9 No. 10 No. 11 DESCRIPTION Side bench Releasing lever Drain plug Stern sheet Thwart Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 11 Lifeboat Construction & Design Hand-propelled Lifeboat (Profile view) ITEM No. 12 No. 13 No. 14 No. 15 No. 16 No. 17 No. 18 No. 19 No. 20 Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) Illustration Diagram D010SA DESCRIPTION ITEM Tiller No. 21 Stern post No. 22 Rudder (unbalanced rudder) No. 23 Propeller No. 24 Stern tube No. 25 Keel rest (aft) No. 26 Stuffing box No. 27 Hand propelling unit No. 28 Footings No. 29 No. 30 DESCRIPTION Keel Stanchions Floors Keel Universal Stem Tanks Bilge Tanks Tank 12 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 13 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 14 Lifeboat Construction & Design Component Nomenclature Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 15 Lifeboat Construction & Design Most lifeboats are usually of "double-ended" construction. Boats of this type are best suited for general use; they are most seaworthy, less apt to broach to, easier to steer, etc. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 16 Lifeboat Construction & Design Benches and buoyancy tanks are incorporated into the inner hull. Each person in the boat is provided with seat belts and must be securely strapped in at each seat position. Buoyancy tanks provide more than sufficient buoyancy to keep the lifeboat afloat on even keel with all persons aboard and filled with water. Along centerline, a center section serves as seating and storage tanks for: 1. fuel 2. water 3. provisions 4. loose equipment Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 17 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 18 Lifeboat Construction & Design A steering tower with windows is provided for the coxswain at the aft end of superstructure for maneuvering. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 19 Lifeboat Construction & Design All lifeboats certified to carry 60 or more but not over 100 persons shall be either motor lifeboats or shall be fitted with an approved type of hand propelling gear. All enclosed lifeboats must be motor lifeboats. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 20 Lifeboat Construction & Design 1. The diesel engine is located in a separate watertight compartment. 2. Engine is fresh water cooled, coolant circulates through piping running externally along the keel at the bottom of the hull 3. Engine can drive a sprinkler pump for fire protection. 4. Engine has an identical backup starting system (Battery one, Battery 2). 5. Engine equipped with an automatic cut-out which stops the engine at a 90 level of heel. 6. Engine exhaust is provided with a gooseneck to prevent entry of water. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 21 Lifeboat Construction & Design 46 CFR 160.0358 Construction of fibrous glass reinforced plastic (F.R.P.), oar-, hand-, and motor-propelled lifeboats. 1. The engine shall be a reliable, marine, compression-ignition type and shall be capable of propelling the fully equipped and loaded lifeboat at a sustained speed of not less than 6 knots through smooth water over a measured course. 2. Provision shall be made for going astern. 3. Sufficient fuel for 24 hours continuous operation at 6 knots shall be provided. 4. The engine used in approved lifeboats shall be capable of being started without the use of starting aids at a temperature of 20F., by the use of an acceptable cranking system. 5. If water cooled, the engine shall be equipped with a closed fresh water cooling system. This system shall be cooled by a secondary medium, such as a water cooled heat exchanger. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 22 Lifeboat Construction & Design The engine is fresh water cooled, coolant circulates through piping running externally along the keel at the bottom of the hull. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 23 Lifeboat Construction & Design In the event of motor failure, openings have been provided in the rigid enclosure so that oars may be inserted from the outside as a secondary means of propulsion. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 24 Lifeboat Construction & Design Oars are conspicuously marked (stenciled) with the ship's name. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 25 Lifeboat Construction & Design All hatches can be opened and shut from inside and the outside. Large side hatches are installed amidships on each side of the superstructure. Side hatches are of the sliding type and provide for easy access. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 26 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 27 Lifeboat Construction & Design All seats are marked with a black marker indicating the correct places. Seats are arranged so each person sits facing the sides of the lifeboat. Each seat is provided with a four point harness easily fastened with a single buckle. Harness keeps personnel in place when lowering and in the event the lifeboat should capsize. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 28 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 29 Lifeboat Construction & Design Releasing Gear & Hooks The lifeboat has two lifting hooks at either end bolted to the keel, hull and superstructure. Mechanical disengaging apparatus installed in approved lifeboats shall be designed to release both ends of the lifeboat simultaneously under tension. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 30 Lifeboat Construction & Design Releasing Gear & Hooks The lifeboat has two lifting hooks at either end bolted to the keel, hull and superstructure. Under normal conditions, the hooks may not be released before the boat is afloat. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 31 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 32 Lifeboat Construction & Design Premature release is prevented by a hydrostatic release device and interlock which locks the hook-release under load, and opens when the lifeboat is lowered to the water. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 33 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 34 Lifeboat Construction & Design The hooks are also designed to be released under full load in the case of emergency. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 35 Lifeboat Construction & Design 1. Skates are attached to the shipboard side of the lifeboat for chafing protection of the survival craft. 1. They prevent ripping the hull if the boat slides down the side of the ship due to seas or list. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 36 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 37 Lifeboat Construction & Design A sea painter is fastened to a strong point on the ship well ahead of the lifeboat. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 38 Lifeboat Construction & Design The painter should be led well forward and tended. It is led inboard of the falls and outboard of everything else. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 39 Lifeboat Construction & Design The first item checked upon entry into the survival craft is the drain plug. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 40 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 41 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 42 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 43 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 44 Lifeboat Construction & Design Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 45 Lifeboat Construction & Design Air Supply System The air supply system designed is to supply air inside the survival craft at a pressure greater than outside atmosphere for a period of approximately 30 minutes depending on operating conditions. The air supply system provides air to the engine for combustion and the passengers for breathing. The system cylinders are filled with compressed air. Air Regeneration System Some survival craft are fitted with an air regeneration canister designed to remove carbon dioxide and provide oxygen for a period of approximately 1 hour. The air regeneration canister is activated by tearing off the tabs on the canister. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 46 Lifeboat Construction & Design Water Spray/Sprinkler System The water spray system on a covered lifeboat is designed to keep the lifeboat from reaching combustion temperature while operating in a fire. With the sprinkler system and air system on and all hatches shut, the survival craft will provide your best protection from a fire and toxic environment Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 47 Lifeboat Markings The builders plate details the particulars of the survival craft. The builder's plate shows measurements, cubic and passenger capacity and other information. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 48 Lifeboat Markings 46 CFR 199.178 Marking of stowage locations. Survival craft should be numbered consecutively starting from the vessel's bow. Survival craft on the starboard side should be numbered with odd numerals and survival craft on the port side should be numbered with even numerals. Where is this lifeboat located on board the S.S. Grand Canyon State? Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 49 Lifeboat Markings 1. The ship's name, port of registry and the boat's number are stenciled on the bow of each boat in letters and numbers not less than 3 inches high. 2. The cubic capacity and number of persons allowed is marked on each bow in letters and numbers not less that 1 1/2 inches high. 3. The number of persons allowed also appears on at least two thwarts in letters and numbers at least 3 inches high. Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 50 Lifeboat Markings The area in way of the red mechanical disengaging gear control lever, from the keel to the side bench, shall be painted or otherwise colored white, to provide a contrasting background for the lever. This band of white should be approximately 12 inches wide depending on the internal arrangements of the lifeboat. "DANGER-LEVER DROPS BOAT." Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 51 Fast Rescue Boat Capt. Murphy/Vessel Familiarization & Basic Safety Training (MT1111) 52 ...
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