SCALES 

 2:1 3:1 



38-1 57- 



36- 









*?6 



I Division =.f Mile ■ 

 ■ .1 Division- 3 Knots '• 



>s£ 



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llu I InmI.ii.I- I I I I I I I I I I I,,,il„„l,ii,l„„l„„l„i,l I I 1 I I I I I 



8 § 



i 1 1 1 i I i i I i i i il 



LOGARITHMIC SCALE 



Given any two corresponding quantities, solve 

 for third by laying rule through points on prop- 

 er scales and read intersection on third scale. 



MANEUVERING BOARD 



Price 60 cents (per pad of 50) 



TIME In minutes 



....sgiiiS Si S SSH8S5 S S DISTANCE In yards 



H ■■ | I | l MM I III M ' H ' H ' 1 ' |l|l|l | ' M 'l' h l'l V ' l 'l "l ' HM '1'I'I'I ' M l Remove or arSal 



- -'»a a 8 S8RS38 C 8 DISTANCE In milts 



N m « u o n O ff S £ RInS"? SS 



I I I I I I I I ' I ' I ' I ' I ' I , , , , I ,,\ I,,,,l,,,,l„.,l„„l„,il„„l 



Washington. DC., published May. 1920. at Hydrographlc Office. 



Ufla^theauthontyolthaSECRrjARYOFTHENAVY ftwi PvWcaoW; 4tn. Ed. Apr, 1938 4th. Sditue, Acru 1338 



FIGURE 17. 



SPEED in knots 

 Relative or actual 



No. 2865 » 



31 



