This course explores the relationship between the earth’s magnetism and the deviation of ships. This course covers the principles and operation of magnetic compasses and gyrocompasses. Students will learn about the differences between the two types of compasses and their applications in navigation. Topics include magnetism, magnetic deviation, and the effects of variation and deviation on compass readings. Additionally, students will gain an understanding of the construction and operation of gyrocompasses, including the use of gyros in stabilising ships and aircraft. This course covers compass navigation techniques, including how to make bearing corrections. Finally, this course covers the topic of errors related to the compass and azimuths.