🔍 Key Concepts

• Difference between gyro compass, magnetic compass, and standard magnetic compass courses • How to apply variation and deviation in the correct order to convert between gyro and standard compass • Remembering the common conversion sequence (for example, "Can Dead Men Vote Twice At Elections" or similar)

💭 Think About

• What information do you need to go from a gyro course to a standard magnetic compass course? Think about which corrections are applied and in what order. • If you start at 243°pgc, should you expect the standard magnetic compass course to be higher or lower? Why would that be, based on the signs (E or W) of variation and deviation? • Look at the answer choices: which ones are plausible if the total correction (variation + deviation) is relatively small, and which suggest a very large correction?

✅ Before You Answer

• Identify which corrections (if any) are needed between pgc (per gyro compass) and psc (per standard compass) for this specific problem setup. • Confirm the correct order of applying variation and deviation when converting from gyro to compass. • Double-check whether any tabular or problem-stem data about variation/deviation at 0520 is implied or provided elsewhere in the exam context before choosing.