When adjusting a magnetic compass for error, a deviation table should be made __________.

Correct Answer: Option A — after adjusting the fore-and-aft and athwartships permanent magnets

A deviation table must be constructed after all permanent and induced magnetic correctors—including fore-and-aft and athwartships magnets—are installed and adjusted. This ensures the table accurately reflects the residual deviation remaining after the compass has been physically compensated, providing the navigator with reliable data for course corrections.