Practical Navigation Course

Practical calculators

Working tools for the computations the course covers. Every result is derived here — check your hand solutions against them.

TVMDC compass solver · Chapter 6

Compass error = 9.0° E

True 134.0°

  • Compass125.0°
  • Deviation3.0° W
  • Magnetic122.0°
  • Variation12.0° E
  • True134.0°

Mnemonic: Can Dead Men Vote Twice At Elections — Compass, Deviation, Magnetic, Variation, True, Add East when working up from compass to true. Working down from true to compass, add westerly error instead.