What feature of a lensatic compass enhances its functionality compared to a magnetic compass?

A lensatic compass enhances its functionality compared to a magnetic compass primarily through the inclusion of a sighting device. This feature typically consists of a lens and a sighting wire or notch, which allows the user to accurately aim at a specific landmark or object while simultaneously reading the compass bearing. This capability improves navigation precision, enabling the user to determine their direction more effectively, especially over longer distances or in rugged terrain.

The sighting device facilitates the ability to take accurate bearings, which is crucial in military operations and navigation. Being able to line up the target with the compass reading reduces the risk of error that may occur if the navigation is done without such a sighting aid. This level of accuracy and certainty is vital in tasks that require detailed orientation and positioning.

Other features, like a built-in GPS system or an electronic display, are not standard in a traditional lensatic compass, as these are more associated with modern digital or electronic navigation tools. A waterproof case, while beneficial for protecting the compass from water damage, does not enhance its core navigational functionality. Thus, the sighting device remains the key feature that differentiates the lensatic compass in terms of its operational effectiveness.