Question 618Navigation General

The correct answer is A) 1° while the vessel is on a compass heading of 000°. Heeling error is defined as the change in deviation caused by a 1-degree heel of the vessel while on a compass heading of 000°. This is the standard definition used in navigation and seamanship. The other options are incorrect because they do not accurately reflect the standard definition of heeling error. Option B is incorrect because heeling error is not constant on all headings. Option C is incorrect because heeling error is measured at a 1-degree heel, not 2 degrees. Option D is incorrect because heeling error is measured on a 000° heading, not an intercardinal heading.