I Division 4 Miles 

 I Division' 2 Knots 



SCALES 



7 1 f V -?'fl 7 ™ ™ » '"m » - «> . s s 8 SSSS 3 8 8 8 8 8 8 8 



I "Mi l i .i.lI, im i I i m i Iiii iI iii i I iiii I ii mI ii iiI I I I I I III , i I,,.,l,..,l.,„l., „ l„„l„„l„„l,.,,l I I I [ I I I I I.,..l....l.,„l,..,l,...l„„l„„l„„l I ij&n \\_l^rt I I I I I II 



LOGARITHMIC SCALE 



DISTANCE In yards 

 Relative or actual 

 DISTANCE In m«e» 



SPEED In knots 

 Relative or actual 



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 



Prito SO cents (p*r pad of 50) 



Wuhinjlon. DC. published H»y. 1920. at Hyd/ogfjphic QKct, 

 under Ihe •uthority ol Ihe SCCRETARY OF THE NAVY 



FIGURE 12. 



N« FWicrfion: 4lh. Ed, Apr, 1936 4th. Dlitv.n, **»li 1930 



No. 2366. 



21 



