How should a lensatic compass be held?

The lensatic compass should be held away from metal and level to ensure accurate readings. Metal objects can interfere with the magnetic needle's ability to align with the Earth's magnetic field, which can lead to incorrect directions. By holding the compass level, the user ensures that the magnetic needle is free to rotate and point towards magnetic north without being obstructed, allowing for a precise bearing. Furthermore, holding the compass away from metal minimizes the risk of magnetic interference, enhancing the overall reliability of navigational readings.

While the other methods of holding the compass may provide some stability, they do not address the crucial factors of avoiding magnetic interference and ensuring the compass is level, which are essential for accurate navigation.