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hour of arc
Symbol:   
Category:  Angle 
SI Equivalent:  0.261799 rad
Dimension a 
 
Notes
Unit of plane angle used in aeronautical navigation.
1 hour of angle= 2p/24 rad
 = 15°
Convert     hour of arc  
1 hour of arc =
Angle
  Symbol Unit Name
900  '  arc minute (minute of arc) 
5.4×104  "  arc second (second of arc) 
4.16667×10-2    circumference 
15  °  degree 
16.6667  gr  gon 
16.6667  gr  grade 
261.799  mrad  milliradian 
26.1808  %  percent 
0.166667    quadrant (angle) 
0.261799  rad  radian 
4.16667×10-2  rev  revolution 
0.5    sign 
Glossary
Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.