What is the magnetic bearing calculated from a true bearing of 180 degrees with a declination of 8 degrees east?

To determine the magnetic bearing from a true bearing given the declination, it's essential to understand how magnetic declination affects the conversion. A true bearing of 180 degrees indicates a north-south line, pointing directly south.

When the magnetic declination is east, it means that magnetic north is to the east of true north. Therefore, to convert the true bearing to a magnetic bearing, you need to subtract the declination from the true bearing.

In this case, you start with 180 degrees and subtract the 8 degrees of east declination:

180 degrees (true bearing) - 8 degrees (declination) = 172 degrees (magnetic bearing).

This calculation leads directly to a magnetic bearing of 172 degrees, reflecting the necessary adjustment for the eastern declination. Understanding the impact of declination is critical in navigation as it ensures accurate orientation and direction-finding.