What is a major benefit of using differential GPS?

The major benefit of using differential GPS (DGPS) lies in its ability to significantly improve positional accuracy. DGPS achieves this by using a network of fixed ground reference stations to broadcast corrections to standard GPS signals. Standard GPS can provide accuracy within about 10-20 meters, but with the corrections provided by DGPS, positional accuracy can be improved to within 1-3 meters.

This high level of precision is particularly beneficial in applications where accurate positioning is critical, such as in aviation, maritime navigation, surveying, and various engineering tasks. The improvement in accuracy helps to enhance safety, operational efficiency, and reliability in navigation systems, making DGPS a valuable tool in the field of avionics and beyond.

Other choices, while they may be related to navigation or operational efficiencies in broader contexts, do not directly address the primary advantage of DGPS regarding accuracy in positioning.