Yes, presumably it is. I remember having a conversation in September 2019 with a very senior U.S. Navy official who was reporting on a NATO naval exercise that took place off the coast of Norway. The Russians had jammed GPS throughout the NATO exercise. This senior U.S. officer was pleased with that, because his personnel on the U.S. Navy ships had to get out their sextants and do it the old-fashioned way in terms of navigation. The Russians had actually improved the exercise by causing this problem and rendering GPS unreliable through jamming.
Yes, we need to maintain the old ways. For instance, we need to know how to navigate an oil tanker from Vancouver out into the Pacific Ocean without GPS. We need to make sure that our ships' pilots know how to use the ground-based lighthouse systems to navigate their ships and not become too dependent on computer screens and global positioning systems.
That's a general issue. As we move further and further into digital technologies, we need to make sure we don't lose the old ways of doing things. If the Internet were lost, if satellites were lost, we wouldn't want to go back to the Stone Age. We'd want to go back to the 1990s.