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352 Screw Motorship Primero The twin screw motorship PRIMERO makes a splendid addition to the growing fleet of modern efficient Nor- wegian ocean cargo carriers. This vessel was recently completed and had her trial trip on July 18 in Copenhagen sound. Over the meas- ured miles it was found that the in- dicated horsepower averaged 2335, at 157.8 revolutions per minute. A mean speed of 12.24 knots was at- tained. The trials were a_ success in every respect according to re- ‘ports and the motor ship PRIMERO has entered upon her service between Seandinavia and South America. The M. S. PRIMERO was built and engined by Burmeister & Wain to the order of the Norwegian owners, Twin qiRia SEE SMERIEARA MARINE REVIEW voted to cargo handling facilities. The holds are served with five large cargo hatches. For each hatch there are two steel tubular derricks and these derricks are served by six 3- ton winches and two 5-ton winches. The winches are electrically-driven, as is also the windlass which is suit- able for 2 1/16-inch chain cables. The steering gear is of the electric- hydraulic type, controlled from the bridge by means of a _ telemotor. Accommodations are provided in the deck house on the bridge for officers and engineers, cook, steward, and a few passengers, as well as an officers’ mess, hospital and a galley of the latest type with an oil-fired range. There is also located in this space a large dining salon. The wireless station is fitted with an 1% kilowatt Marconi set. The wireless operator’s TWIN SCREW MOTORSHIP PRIMERO BUILT FOR NORWEGIAN OWNERS FOR THE SOUTH AMERICAN FREIGHT SERVICE BY BURMEISTER & WAIN Ibarans & Rederi, Akts., Oslo. The principal particulars of the _ vessel are: length between perpendiculars, 3867 feet; beam molded, 538 feet 6 inches; depth molded to upper deck, 27 feet 6 inches; depth of double bottom, 41 inches; gross register ton- nage, 4414 tons and net register ton- nage, 2668 tons. The cargo capacity of the vessel in bales is 400,900 cubiz feet, and in grain, 428,200 cubic feet. She has a deadweight of 7800 tons on a loaded ‘draft of 238 feet 11 inches. The PRIMERO is classed in Nor- wegian Veritas and is of the single deck type with a poop,. bridge and forecastle. She has six watertight bulkheads and four cargo holds, two forward and two abaft the engine room. The double bottom extending the entire length of the ship may carry either oil fuel or water ballast, the total capacity of the former be- ing 1060 tons and the capacity of the latter 1485 tons with the fore and aft peaks included. Particular attention has been de- cabin and the chart room and wheel house are located in a teak deck house on the navigating bridge. The crew is accommodated in well light- ed, well ventilated, steam heated, spacious rooms, two men per room. An oil-fired donkey boiler located in the engine room supplies the steam for the heating system. The propelling machinery consists of two six-cylinder, 4-cycle single act- ing and forced lubricated diesel en- gines of Burmeister & Wain new light built type for twin screw ves- sels. The revolutions per minute are 150 and the indicated horsepower is 2300. Stipulated speed at sea is to be not less than 10% knots. The daily fuel oil consumption per 24 hours is about six tons, giving the vessel a cruising radius of around 50,000 miles. All the auxiliary machinery in the engine room as well as on deck is electrically driven. The current is supplied by three dynamos, two of 33 kilowatts and one of 66 kilowatts, driven respectively by two single October, 1925 cylinder and two twin cylinder auxil- iary diesel engines, also of Bur- meister & Wain make. Any one of the dynamos is sufficient to supply the current required for normal op- eration at sea, while only two have to be in operation with all the winches working at full power. * * * Twin Screw Motorship Sorvard On April 11, 1925, the twin screw motorship SORVARD was given a trial trip in Copenhagen sound. A mean speed of 13.386 knots was obtained on this trial with a fuel consump- tion of 142 grams per indicated horse- ‘power hour of the main engines, the net calorific value of the fuel being 10.78 calories per’ kilowatt. The main engines developed a total of 38060 indicated horsepower. The fuel consumption given included that for the auxiliary engines producing cur- rent for driving the auxiliary ma- chinery, steering gear and electric lights. The SORVARD was ordered by the Norwegian shipowner, Lauritz Klos- ter of Oslo, and was built and en- gined by Burmeister & Wain to the highest class of Norwegian Veritas and to the requirements of the Nor- wegian laws. Some of the principal characteris- tics are: length overall, 384 feet; length between perpendiculars, 367 feet breadth molded, 51 feet 3 inches; depth molded to shelter deck, 34 feet; depth molded to upper deck, 25 feet 6 inches; and depth of the double bottom, 46 inches. The deadweight of this vessel is about 7050 tons on a loaded draft of 23 feet 3 inches. The gross tonnage is about 3678 tons. Fuel consumption per 24 hours fully loaded operation is 8% tons. The accompanying illustration will show quite clearly what a fine type of cargo vessel this twin screw motor- ship makes. She has. two complete steel decks and six bulkheads. The double bottom is arranged for oil fuel or water ballast. The fuel oil capacity is 1058 tons. The vessel is divided into four cergo holds which have a total grain capacity of 409,000 cubic feet and a bale capacity of 382,000 cubic feet. Each hold has a hatch with an addi- tional one for the main hold, and all hatches are 20 feet wide. Ten der- ricks served by ten 38-ton winches make up the cargo handling facili- ties. The winches are all electrically driven. Other deck machinery such as the steering gear is of the elec-