SCALES 



s assssl§ S 



mo «i ° tfiomg 8 8 S 8 8 e 5 *» s 



■ ■! L I'. LiukiL i l'i I iTil ■ ■ ■ ■ i ■ . ■ ,T.,,.t,.,.T Uimfaul i T i I i I 1 1 ■ ■ , ■ i , , ■ .1.,., 1 I,,,,!,,..!. I I I I I I I I 1 I I I I I I i I 1 1 



LOGARITHMIC SCALE 



Given any two corresponding quantities, salve 

 for third by laying rule through points on prop- 

 er scales and read intersection on third scale. 



MANEUVERING BOARD 



Price 60 conta {per pad of 50) 



TIME In minutes 



. 8 i § i issiillllll I §§§!!!§ i!!§i IIIHIII II 0,^0™ 



_h f 1 1 I I I I l | I I I ||l | l|i|i h l 1 I I I l|l|l | ' H' l 'H ' H 'l "" l 1 I ■ I ■ 1 ' I ■ I ■ 1 >! ' I 1 I Re«w or actual 



8 SSRSS8 S 8 DISTANCE in mites 





m * in » r* » « 9 'J ° S S n 3 S3 



I I I I J I 1 I .1 I I I I I I I .... I ... .1 ....I....I I .I.M.Im.l 



SPEED in knots 

 Reiabve or actual 



Washington. DC. published Msy, 1920. it Hydrographic Office, 

 under the authority of the SECRETARY OF THE NAVY 



FIGURE 25. 



N««P»btattm4»>{4,A|>r. 1938 4Si Sditreu, Ann! 1938 



47 



