STEBBING, F. Azimuth Tables for the Higher Declinations (limits of declination 24° to 30°, both inclusive) between the parallels of latitude 0° and 60°, with Examples in the use of the Tables ...

Step 4 Check the calculations by using the last interior angle to recalculate the starting azimuth. Example For the figure below, calculate the direction of each line and provide a check.