Re: No worries
More like the Coast Guard as it doesn't get above LEO. A Navy is blue water, comparable with trans-Lunar space.
The USCG is actually a world-wide maritime service, but has a different mission than the USN. To quote (and this pains me) Wikipedia, "while the U.S. Coast Guard is the smallest of the U.S. military service branches, in terms of size, the U.S. Coast Guard by itself is the world's 12th largest naval force."