^ rn T n,l ?" J, J 



-10 



:::.-V 



SCALES 

 4:1 5:1 



....... .^ „»... 



' i 



■#. if. -.•♦■•■« * tf- •• — ■•»•■ 





!=■ S- SSRS 8 8 S 8 8 S S 3 



i',,,,l,,i,'r I„„I„„L„I,„,I I 'l I 1 I I I I . . . . 1 . . . . I...,l,.,,l n,l I„„l„„l I I I 111 ll I I I I I I 



m «o h* » o» 



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) 



s R fi ssaSRigilll § § I I §!§§ I §i§| | ; 



8 8 8 aSSSiSSiSSS % S S S SS.a = s-!8 a S 8^8885 8 S DISTANCE in yards 



| l | i | l | | | [ | |l| 'l'l ' |i| I I 1 I I |l|'l'l'l'l'l ' l'l'l' l ' " i L>-P H'l 'l'l' l I I ' I Relate or actual 



TIME in minutes 



8 DISTANCE In milas 



J L 



m t <n o r« a a S 



■ I I I ■ I I I I I 1 hhl , .. 



K 8 S S S3 



<"'■■■' I ■ ' ..I....I L.,l,,..L,.ln„l 



SPEED in knots 

 Relative or actual 



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

 undcf the authority ol the SECRETAJTf OF THE NAVY 



FIGURE 3. 



tie* PoWicetJoft; 4th. 10. Apr., 1936 4ui. Editioo, April 1938 



No. 2635o 



