SCALES 

 2:1 3:1 

 38 — i 57 — I 



I Divisfon=.t'Mile ■ 

 • . I Division ■' 3 Knots ' • 



o— ' 

 S 



I'.ii.i 



SCALES 

 4:1 5:1 



•* "J «3 r>; ^ 01 — « m ♦ tn <o i* a o» S 



iiiiii liiiiiiiiiliiniiiiil i h 1 1 1 1 1 i i i i i i 1 1 1 1 1 iiiiiitilini I I I i I i 1 1 1 1 1 



3 g 



i i I i i i il 



LOGARITHMIC SCALE 



Given any two corresponding quantities, sotoe 

 for third by laying rule through points on prop- 

 er scales and read intersection on third scale. 



TIME In minutes 

 a a a a aaaaS 8888§ § 8 §§§§§§ I irfll 1 § § !!§§§ § 1 



8 8 8 §§ IgBSS SSS8S 8 8 88888|»|P| S R ggggggg a g BBTAHCEhyanls 



H 1 1 ' 1 ' I ' I I I I M'H ' I ' H ' I I I ' |l H 'l' ' l' H 'l' f 'l' l ' H l| l | I t I 1 1 T ' !■ I't ' 1 ' I Relanye or actual 



"8 s a RSSSSSS R 8 DISTANCE in miles 



MANEUVERING BOARD L 



Price 60 centi (por ptd of 50) 



N « -r « -a rs ra o 2 £ 8 1 8 R S S 8 8 



J 1 1 L 1 1 I I I I I I I I I I ll I ,.|,,l,...l I.M.1....I I 



WishLnflon. DC. publohs) M*y, 1920, si Hydnjeraphlc Office. 



uiti* tht authority of the SECRETARY OF THE KAYY Haa PubOcrion: 4th. Ed, Apr, 1933 «h. Editjoo, Aflrtl 1933 



FIGURE 10. 



SPEED in knots 

 Relative cr actual 



17 



