Gathering Deviation Data for Your Vessel

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While underway with the boat on cardinal and intercardinal compass headings, note the corresponding magnetic heading. Enter your data into the provided deviation table as in the sample HO226 table below.

Compass Heading Deviation
N (000º)  
NE (045º)  
E (090º)  
SE (135º)  
S (180º)  
SW (225º)  
W (275º)  
NW (315º)  
data sample
Go back to the Deviation Calculator.