418 



Tables for determining Heights, fyc. fyc. 

 Table IV. — Correction for Latitude. 



[No. 5, 



Altitude in 

 Feet. 



Latitude. 







10 



20 



25 



30 



35 



40 



Correction in feet additive. 



1000 



3 



3 



2 



2 



1 



1 







2000 



5 



5 



4 



3 



3 



2 



1 



3000 



8 



8 



6 



5 



4 



3 



1 



4000 



11 



10 



8 



7 



5 



4 



2 



5000 



13 



13 



10 



9 



7 



5 



2 



6000 



16 



15 



12 



10 



8 



6 



3 



7000 



19 



18 



14 



12 



9 



6 



3 



8000 



22 



20 



17 



14 



11 



7 



4 



9000 



24 



23 



19 



16 



12 



8 



4 



10000 



27 



25 



21 



17 



13 



9 



5 



11000 



30 



28 



23 



19 



15 



10 



5 



12000 



32 



30 



25 



21 



16 



11 



6 



13000 



35 



33 



27 



23 



18 



12 



6 



14000 



38 



35 



29 



24 



19 



13 



7 



15000 



40 



38 



31 



26 



20 



14 



7 



16000 



43 



41 



33 



28 



21 



15 



7 



17000 



46 



43 



35 



29 



23 



16 



8 



18000 



49 



46 



37 



31 



24 



17 



8 



19000 



51 



48 



39 



33 



26 



18 



9 





Correction in feet, subtractive 



90 | 



80 | 70 | 65 60 



55 



50 



Latitude. 



