Which phrase helps to remember how to convert compass heading to true heading?

The phrase "Can Dead Men Vote Twice At Elections" serves as a mnemonic device to assist in converting compass headings to true headings. Each word in the phrase corresponds to a specific adjustment needed when determining true north from magnetic north.

In navigation, compass headings are influenced by magnetic variation, which is the angle difference between magnetic north (the direction the compass points) and true north (the direction along Earth’s surface towards the geographic North Pole). To convert from compass heading to true heading, navigators need to account for this variation, which can be either east or west depending on the location and current magnetic conditions.

This phrase not only aids memorization because of its quirky and memorable structure but also encapsulates the necessary steps involved in the conversion process. It's a useful tool for students and professionals alike in ensuring accuracy while navigating.

Other phrases, while they may pertain to navigation, do not specifically relate to the conversion of compass headings to true headings and therefore do not serve the same purpose.