🔍 Key Concepts
• Relationship between compass course, magnetic course, and true course
• Effect of variation (west or east) on converting between magnetic and true
• Effect of deviation (west or east) on converting between compass and magnetic
💭 Think About
• First, think about how to get from compass to magnetic: does east deviation get added or subtracted when going from compass to magnetic?
• Next, think about how to get from magnetic to true: does west variation get added or subtracted when going from magnetic to true?
• After each step, ask: should the value be getting numerically larger or smaller based on the rule you use?
✅ Before You Answer
• Write the standard memory aid you use (for example, "Can Dead Men Vote Twice" or similar) and line up C, D, M, V, T in order
• Make sure you apply deviation first, then variation, starting from the given compass course
• After calculating, check if your final true course is within a reasonable range of the original compass course (not a huge, illogical change)