SCALES 

 2:1 3:1 



SCALES 

 4:1 5:1 



C~ 76 c- 95 



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 cents (per pad of 50) 



I I § § § §§S§ § 25?2 2 5 2 5225* SSSSs s saasaaS a ?, 0KWNC e in wr* 



I l I ' I i I I I I I' H 'I' H i | l I l M ' H H ' M 'I i'l' " > ' 1 ' I ' H 'I' l ' l ' 1 ' I Relative or actual 



„ « ^..^.i.o B R SSSSSa R 8 DISTANCE in miles 



j L 



m o c <a 9i S £ R (Mmo9 S3 



I I I I I I 1 1 1 1 1 ■ ... I .... 1 1....I....I ,.,.l,...l„..[ 



SPEED in knots 

 Relative or actual 



Washington, D C, published M*y. 1920. at Hydrography Office, 

 under LSe authority of the SECKCfAftY CF ,IHE HAW 



FIGURE 20. 



Hon PubtaSon: 4th. Li, Apr, 1538 



WvEditjoo. April] S3* 



No. 2665 a. 



37 



