. A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. . iot tide in iier favor, until 7h 3f>m P. M., when the same lightwaa observed to bear N. W. by W. Required her distance off at both bearing S. W. by W. ) . , 2d bearing N. W. by W. ) , Course S. by W. ^ W. \ ^^^^ ^* P^ Curse S. by W. ^ W. f ^^^ ^* P^ Takeu at tke top of the Table. Taken at the side of the Table, glTes the Tabular Number » Distmice sailed in 1^ hours. 12 milea. Multiply by 16 Add for tide 3 ~346 Distance ma
. A new treatise on the practice of navigation at sea : containing all the details necessary to enable the mariner to become a good practical navigator. . iot tide in iier favor, until 7h 3f>m P. M., when the same lightwaa observed to bear N. W. by W. Required her distance off at both bearing S. W. by W. ) . , 2d bearing N. W. by W. ) , Course S. by W. ^ W. \ ^^^^ ^* P^ Curse S. by W. ^ W. f ^^^ ^* P^ Takeu at tke top of the Table. Taken at the side of the Table, glTes the Tabular Number » Distmice sailed in 1^ hours. 12 milea. Multiply by 16 Add for tide 3 ~346 Distance made good 16 miles. 6t» The siiips distance off the Light at 7h 3(lm P. M. is 10^ milea, or lOMTo tiad the distance oflf at 6 P. M.,Che first angle was 3^ points, 2d an^le V-^ points. ) 4ub»r<.cl from 16 Sub. from 16 \ The Tabular Number is found to be l*k8 at the side T2i points. At the top ~6i points. ) Distance made good _16 61fi10 S The ships distance off the Light when peen at 6 P. M., was 16^ miles, o. 1*44 PROJECTION OF THE ABOVE EXAMPLES,Skmcing the Distances found by the Tables to be correct, as measured in the Diagram. Fig. Ce^ msl J)isl H^fftlcs SCALE of MILE5 t i 6 T t 2 IC 94 FINDING THK SHIPS POSITION. FINDING THE SHIPS POSITION FROM TWO BEARINGS OF THE SAME OBJECT. CASE II. Given, two Bearings by Compass of an Object on Shore, with the Distance sailed between them, to ^nd ilu Ships correct Position in Latitude and Longitude. This case is useful in finding the Sea Rate of the Chronometer. (See page 155.) EXAMPLE 1. At 6 oclock A. M., Neversink Light-House bore by Compass W. by S. i S. Ship then sailed on a S. | W. Course,«t the rate of 6^ knots an hour, until 7 A. M., when the same object bore N. W. by N^ variation ^ point WestRequired, the Ships Latitude and Longitude at the time of each Ist Bearing W. by S. i S. by Compass. 2d Bearing N. W. by N. by Compass. Corr. for i pt W. var. is W. S. W., j . „, „ ,.+= Corr. for ^ pt var.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnavigat, bookyear1902
