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"COURSE AND BEARING CORRECTOR." The Marine REVIEW will soon have on the market a device known as a "Course and Bearing Corrector." This device is for mechanically applying the variation and deviation in the con- version of courses--from true to com- pass> and vice versa. It is a. very handy and useful contrivance, and it will be found especially helpful to the beginner in learning how to cor- rect courses and the reason for the rules. No matter how expert one may be in navigation, the best of them are liable to mistakes. when it comes to correcting courses, such as in allowing the variation and the devi- ation the wrong way. Many a boat has been put ashore for just such mistakes. With the corrector there is no chance of mistakes, since all work performed by it proves itself. The corrector consists of three sep- arate compass cards, one revolving within the other. The outside, or sta- tionary card, represents the true points of the horizon and the inside card the Variation Compass and the inner card the Deviation Compass. You merely turn the magnetic card to the amount of your variation and the deviation card to the amount of your devia-- tion, the compass course to be steered according to the true course sought will show 'itself at once. This is done by means of a string leading from the center. This string is held over the true course, hence, where the string cuts the edge of the Variation compass gives the correct magnetic course, and where it. cuts the Devia- tion compass. gives the compass "course to be steered. One cannot make a mistake, since the turning of the cards corrects the course mechan- ically. Another thing, everything is figured from north and the operator can see at a glance that north on the inner card must be turned to the right of true north for Ely variation, and to the left for Wly variation, and just so with the Deviation card. When a master has corrected his. course for variation and deviation he should have some way of verifying his work. This corrector will do this for. it solves all problems of. the compass mechanically. The beginner usually finds it very difficult to thoroughly understand the reason for the various rules of cor- recting the course. Use of the cor- rector will make this all very plain to him. You can learn more about cor- recting courses in one hour with this corrector than you can in a week's time by the ordinary methods of nav- igation. The Corrector is large enough "TAE MaArRINE. REVIEW to give large marginal divisions so that when working to degrees every- thing is very distinguishable. There are many other usages the corrector can be put to besides the correcting of courses. A full explanation with practical examples accompany each corrector. Ihe price of. the Correc- tor is $1. Send in your order at once and get one hot from the press. Capt. Wharry will also have the. sale of the Corrector at the Sault. He will board all boats so all those engaged in that trade will have an opportunity of see- ing the device. before purchasing. -- QUESTIONS FOR WHEELSMEN AND WATCHMEN. SECOND INSTALLMENT. 13. "How does 'the point NNE on the 'cotipass get its name? pe 14. What is the Lubber's Mark or Lubber's - Point: of the compass? Where is it and what is it for? 15. How many points is it. from NE to "Sie 16. What point on the compass is the reverse. of EN? 17. lf the wind.is NE and a vessel -- sails 5 points from. the wind close- hauled on the starboard tack, how should she be heading by compass? ~ 18. How can you tell whether a sailing vessel is on the port tack or starboard tack? 19. How can you tell what tack' a vessel is on in thick weather? 20. horn should a sailing vessel blow when she is on the starboard tack with the wind forward of abeam? 21. What is meant by forward of abeam? : 22:. Jf a boat was, heading N x &, how many points forward of abeam would E x N be? 23. What point on the compass is abreast of, NNE on the. starboard side? 24. lf a vessel: "sails 514 ports from the wind when running close- hauled, ,how should she head on the port tack with the wind NW? On May 11 there was launched from Roach's 'Ship Yard, Chester,.Pa. the new freight steamer New Haven, built for the New England Navigation Co. The vessel is of 3,000 gross tons and is 292 ft. long, 45 ft. beam, 65 ft. over the guards, and 19 it. depth of hold. She has one triple-expansion engine, size 20, 34 and 56 in. cylinder diameters by 42 in. stroke, steam to be supplied by three Scotch boilers, each 13 by 12 ft. The New Haven will ply on Long Island Sound. Montgomery, How many blasts of her fog' 21 MAJ..CHARLES KELLER. Major Chas. Keller; engineer of the eleventh lighthouse district and in gen- eral charge of rivers and harbors on Lake Huron with headquarters at: De- troit, reached his present rank on Jan uary last. Under his direction much important work is being done on the chain of great lakes, Major Keller was born in New York, Feb. 13, 1868, and was appointed -as cadet to the United States Military Academy 'July 1, 1868. He graduated in 1890 and was made second lieutenant in 1892. His first general assignment was in the United States Engineers' Office -at: Ala., ine 1893. He was transferred to Rock Island in. 1894 and served there until 1898. He was pro-. MAJ. CHARLES KELLER, moted to the rank of first lieutenant . in 1895. During part of 1898 he was in local charge of torpedo boat De- fense Harbors of Charleston,. Port Royal, S. C. During 1899 he was sec- retary of the Missouri River Commis- sion, in which office he continued with headquarters at St. Louis until 1901. He was promoted to rank of captain in 1900. From 1901 to 1903 he was in charge of the river and harbor works on the eastern-shore of Lake Michigan with headquarters at Grand Rapids. In 1903 he went to the Philip-. pines where he was commander of Co. K. Third Battalion of Engineers. He was engineer of Moro Province from 1903 to 1905 serving as engineer officer. of,the department of Mindanao. Since September, 1905, he has been engineer of the eleventh lighthouse district. Among his important work at present is the construction of the lighthouse on Rock of Ages, Lake Superior.