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New Matson Liner Mariposa Launched at Fore River vessels in the $25,000,000 building program of the Matson line, was launched July 18 at the Fore River yard of the Bethlehem Shipbuilding Corp., Quincy, Mass. Mrs. Wallace Alexander, wife of the vice president of the Matson line, christened the new vessel with a bottle of water from the harbor of Sydney, Australia. The keel of the MARIPOSA was laid on June 11, 1930, and will be delivered to the own- ers early in 1932. When completed, the vessel will be placed in the pas- senger and freight service of the line between San Francisco, Honululu and Australia. The vessel is built to the highest classification of the American Bureau of Shipping for oceangoing vessels. The Mariposa is 631 feet 6 inches long overall, 79 feet beam, 52 feet 9 inches depth to “C” deck; and ap- proximately .20,000 gross tons. The vessel will have a speed of about 20 knots in loaded condition. Accomo- dations have been provided for. 477 first class passengers and 229 tourist passengers. A crew of approximately 389 persons will be carried. On the “A” deck there are ten de- luxe staterooms with private baths, private verandas, lounge, foyer, li- brary, writing room, smoking room, ballroom, etc. On the “B” deck for- ward is the forecastle head with elec- tric: windlass, capstan, bitts, ete. On the: open deck forward: of the deck house is located the first class passen- gers’ swimming pool. Located amid- ships on this deck are the staterooms fitted with all modern conveniences. Some of these rooms can be grouped into suites consisting of two _ state- rooms surrounding a salon, entrance alcove, and two com- plete bathrooms, with tubs, lockers, and trunk room. On the “B” deck is the sec- ond swimming pool located on an open deck for tourists’ promenade. The large outside staterooms fitted with two beds, two lockers for cloth- ing, individual toilets and bathrooms, are located on the “C” Te S. S. Martrosa, first of three deck. Aft on this Same deck are the tourists’ lounge, foyer, smoking room, toilets, veranda, and the promenade out- Side which is partly enclosed with open deck at after end. Forward on the “D” deck is the crew’s space. Aft of the crew’s space are longitudinal rows of staterooms, some fitted with private bathrooms. Aft of the after foyer on this deck are groups of tourist state- rooms with lavatories. Located for- ward are the first class barber shops, hair dressers, manicurists, etc. On “E” deck are located spaces for the crew including medical spaces, Principal Characteristics Length overdisaboutcc. ser ae eee 6316" Length between perpendiculars........... 605’ 0’’ Beam Molded os 250 ce ak eee ee LOO Depth-molded; ‘to:""D" deck 45 aes, 44’ 6” Depth, molded, to: (CGC? deck. oie. Ss 5200" Draft for scantlings and subdivision........ 28’ 0” Designed load draft, molded.............. 27 Oe Displacement at designed load draft (tons), BOOM Caine Page clue e a Ee ee 5,000 Gross tonnage (estimated) s. 0804 ee os 20,000 General cargo capacity (cubic feet), about. - 240,000 Refrigerated cargo capacity (cubic feet), AHOUE Re eeae Ee SE ieee 35,000 Fuel oil capacity, tons; about... .s..s.e. « . .6300 Fresh water capacity, tons, about......... 2800 Passenger accommodaitons, first class......... 477 Passenger accommodations, tourist........... 229 Total*persons<ony boOatds.. cee oes 1095 Shaft horse ‘power, mormali< sec, os oii a 22,000 Speed service in knots: 6x45 Fe ew wc oe oc 20 oe messrooms, etc. Also on this deck are the main foyer and offices for the purser, freight clerk, chief steward, telephone control, elevators, first class dining salon, foyer, galley and pantry spaces, tourists dining salon, foyer and a number of tourist outside state- rooms with lavatories, barber and hair dressing shops. Spaces on the “F” deck are given over to stores forward, crew cargo between decks, mail room, linens and laundry, baggage, stores, ship’s refrigerated stores, refrigerated cargo, tween deck cargo, etc. On the “G” deck are cargo spaces Launching of the Matson Liner Mariposa July 18, Fore River MARINE REvirew—August, 1931 forward and fresh water tanks, refrig- erated cargo, cargo in general and steering gear aft. Fuel oil spaces, boil- er rooms, engine rooms, drinking and fresh water tanks, are located in the hold of the vessel. A deep inner bot- tom is subdivided into tanks for oil, fuel and fresh water. The Mariposa has two large stacks and is schooner rigged with two pole masts. On the fore mast are four 5- ton booms.- Just aft of this mast is one 20-ton boom for handling cargo. On the main mast are two 5-ton booms. Electric winches are located adjacent to the mast for operating the booms. There are also two kingposts located aft for handling cargo with booms. In compliance with the United States steamboat inspection service, fire screens, bulkheads and steel doors are located at required intervals. The ship is properly subdivided into watertight compartments below the bulkhead deck by twelve transverse steel bulkheads. This arrangement brings the ship well within the re- quirements of the International Con- vention for Safety of Life at Sea of 1929. The twin screw propelling machin- ery will be impulse reaction type geared turbines which develop about 22,000 shaft horsepower at 125 revo- lutions per minute. These turbines were built by the shipbuilder. Steam will be supplied by 12 watertube boil- ers fitted with superheaters having a working pressure of 375 pounds per square inch and a total steam tem- perature of about 640 degrees Fahr. These boilers are designed for oil burning and operate under forced draft. A fuel oil capacity of 6300 tons will give the vessel a steaming radius of about 20,000 nautical miles. The vessel was launched at 1:45 p.m. into about 800 feet of water, the ship traveling about 140 feet beyond the end of the ways. Checking was accomplished by means of chain drag, approximately 360 tons of chain being used in six coils graduated in weight. The launching weight of the ship and cradle was 12,200 tons. Average decliv- ity of the ground ways was 9/16 of an inch. Width of ground ways was 5 feet. Length of cradle was 497 feet 6 inches. The initial pressure was 2.55 tons per square inch. The lower end of the berth on which the MARIPOSA was built is approximately 2 feet 6 inches below low mean low water, the water being re- strained by a portable gate at the lower end of the berth. The op- eration of removing the gate began at ap- proximately 6 a.m. as 55