This is still important, e.g. the Navy teaches celestial navigation in case GPS is disrupted. https://www.thedrive.com/the-war-zone/3865/this-is-likely-why-the

This is still important, e.g. the Navy teaches celestial navigation in case GPS is disrupted. https://www.thedrive.com/the-war-zone/3865/this-is-likely-why-the-navy-is-causing-a-massive-and-mysterious-gps-outage-in-the-western-us https://www.thedrive.com/the-war-zone/3865/this-is-likely-wh...