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20 DEVOTED TO EVERYTHING AND EVERY INTEREST CONNECTED OR _ ASSO- CIATED WITH MARINE MATTERS ON THE FACE OF THE EARTH. Published every Thursday by The Penton Publishing Co. CLEVELAND. BU PATIO. (ooo cas sc c's ce soos 932 Ellicott Sq. "CHICAGO ...<..:¢:%.. 13862 Monadnock' Blk. CINCINNATI ....... 124 Government Place. NEW YORK wivces ss -1005 West Street Bldg. PET TS BURG eseaia cacw ess 521 Park Bldg. DULUTH..........0.- »..411 Providence Bldg. Correspondence on Marine Engwneering, Ship Building and .Shipping Subjects Solicited. Subscription, U. S. and Mexico, $3.00 per "annum. Canada, $4.00.. Foreign, $4.50. Subscribers can have adresses changed at will. Change of advertising copy must reach this office on Thursday preceding date of publication, The Cleveland News Co. will supply the trade with the Maringi Review through ' the ._ regular. channels of the American News Co. "uropean Agents, The International News Gompany. Breams Building, Chancery Lane, London, E. C, England. Entered at the Post Office at Cleveland, Ohio, : as Second Class Matter. © June 13, 1907. OUR COURSE CORRECTOR. The demand for a simple mechani- Gal. Coutse Corrector" has the years to warrant the production of grown sufficiently great in past few same. It is to supply this want that the Marine Review has gone to the expense and trouble of producing a co rector that is especially adapted to the needs of the lake profession. The device is for the purpose of me- chanically solving many of the simple problems of navigation which daily 'confront the masters and pilots of all vessels. In laying down courses so 'many disasters 'have resulted from a mistake being made in applying the deviation or variation the wrong way, even when the master had perfect 'knowledge of the rules of such appli- cation, that a mechanical device which is absolutely correct under all cir- cumstances, should be viewed with to be relied upon. tion of master and mate TAE. MARINE REVIEW much satisfaction by all navigators. The human 'mind is liable to error, but a machine which is correct in the first instance, will never make a 'mis- ye he upeben ree Objection is sometimes made by a .few of our best educated officers that they prefer to trust to a paper, pen- cil and their own figures rather to any . mechanical method of solving problems. so infallible in his calculations that There' is no -man who is a, check is: never necessary; and' for the purpose of a check the device is invaluable to such navigators. ing a 'mistake in adding a column of figures' and .being unable to. discover it. But the 'adding machine never adds incorrectly, and what banking 'house or large commercial house is today -without one of these valuable little mechanical devices? To the beginner who is desirous of learning variation and deviation and their rules of application, the in- strument will be found invaluable. SAFE NAVIGATION. The safe navigation of the lakes is dependent upon the course steered, thence the compass is the instrument To be upon the master must have a know- depended ledge of the azimuth tables in ascer- taining the deviation of his compass, the taking of bearings of prominent points, lighthouses, and other objects shown on the chart, and from them fixing the position of his ship at frequent the laying courses' and correcting same intervals; also. familiar use in for variation, deviation, leeway, etc., the taking of soundings and the use of the safety curve in thick weather, etc. Leeway is an important factor in navigation, especially when a boat is in light trim with a strong beam wind. The for leeway many times is greater than the corrections correction for variation and deviation combined. The way boats are built now days, with deviations continually' changing caused by a change in the trim of the hull together with the magnetic ef- fects of an iron ore cargo, the posi- is one of great responsibility, and.)both must We have all had the experience of mak- matter and the be constantly on their guard to verify the every means They cannot afford to miss even the ship's course and position by known to navigation. slightest opportunity of verifying their work, so that recourse must be. had to all the known methods that will apply in the' various situations they ~ find themselves. When azimuths. are available-no better means is afforded in the making of good courses; when azimuths are not available then other The master' and. mate must study these methods must fake its place. methods as. well as the azimuth mode.. The object of the MARINE REVIEW'S nautical department is to make the work of those in the forward end of the ship easier and moze pleasant. It is to bring all hands closer to- gether, the master with his mates, the mates with the wheelsmen and watchmen, and the whole with the owner and manager. All we want is your confidence and interest in this MARINE REVIEW will do the rest. It is to be hoped that the instructive features of the paper will be read with interest from the master down. WHAT OUR SALT WATER COUSINS THINK. Lake masters. and mates have not .When it comes to taking their boats through their equals in the world. the intricate waterways connecting the lakes, and into the harbors and rivers, and landing and getting away again from alongside of a wharf, the skillful manner in which. they -per- form it, invariably brings forth praise from those who see it and are com- . petent to. judge. One day recently while Capt. Wharry and a gentleman from New York were watching one of the largest steamers on the lakes,' the: J Morrell Cant, Po S: Millen, coming into the locks at the Sault canal, the New York man remarked with much enthusiasm and emphasis, that that such a large boat could' come in with- He said, if such a boat were to move around in it was simply marvelous out the aid of tugs. New York harbor in that. manner she would be attended by at least four