What is the minimum distance to remain away from high tension power lines when using a compass?

When using a compass, it's essential to maintain a safe distance from high tension power lines to avoid interference with the magnetic field and ensure the accuracy of the compass reading. The correct distance of 60 meters is recommended because this distance helps minimize the risks associated with magnetic interference caused by the electrical currents flowing through the power lines. Getting too close can lead to deviations in the compass reading, resulting in navigation errors.

Other distances provided in the options, while somewhat safe, may not adequately address the level of interference that can occur. The specific recommendation of 60 meters is based on standard safety guidelines for compass usage near high tension lines, making it the appropriate choice for individuals relying on accurate navigation.