SCALES 

 2:1 3:1 



SCALES 

 4:1 5:1 



1 1 1 nullum 



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 L 



Price 60 conts {porpadof 50) 



■'■ 7 iTlT.TlT.,.,.,., ,T,,,,I,,,,T L„li.„l. I 1 "l I 1 I'l'll I r. l ,.lM,.|.,..l.mL,hml I I 1 I I 1 I I I I M 1 II 1 I I 



TIME In minutes 



8 I I SSSeSiiiliil S 5 iisiiisilSa s ssssssi 8 1 distance in yar* 



_) 1 1 i ] I I i I 1 I I M ' H 'I'I' I I I I I '|i H '|i | i | '|i H '!'| mm | I | I | i| i| i | i| i| i I I I Relative or actual 



c -> » «. . .~»»o B S KStSSJg s S DISTANCE In miles 



* « 



j L 



i i i i i i i i TiTiTiT 



S S S IS s s s 



.1 1..„l„„l 1....1....I 



SPEEO in knots 

 Relative or actual 



Washington, O.C, published May, 1920. at Hydrography Office, 

 under the authority of the SECRETARY OF THE NAVY 



Km Publication: 4th. Ed, Apr, 1933 4th. EciBun, April 1933 



FIGURE 37. 



593046° 



73 



