Why is it essential to be aware of compass deviation?

Being aware of compass deviation is essential because it directly impacts the accuracy of the vessel's heading. Compass deviation occurs when the magnetic field of the Earth interacts with any magnetic materials or electronic equipment on the vessel, causing the compass to point inaccurately. This means that the course you believe you are on may not be the actual course being sailed, which can lead to significant navigational errors.

For safe and effective navigation, understanding and correcting for this deviation ensures that a vessel is aligned with its intended path, crucial for avoiding hazards, maintaining safe distances from other vessels, and reaching destination points accurately. Accurate heading information is vital for navigation, especially in areas where precise positioning is critical for safety and compliance with navigation rules.