GPS made the surface world possible. It is not just positioning. It is the infrastructure layer that enables trillions of dollars of economic activity, including communication and remote navigation. Every drone and vehicle on land or in the air operates inside the GPS layer because governments built that infrastructure decades ago.
The ocean has nothing equivalent. Every industry operating underwater works around the same gap. The cost compounds across every undersea mission. The ocean is the largest economically active environment on the planet without precise positioning, and that gap is the bottleneck holding the entire domain back.