“Interesting. I have several friends who were in the Navy and who were told that when born in the base hospital, their children were no different than a child born inside the US on a military base, i.e. natural born with no need for them to send mommy home to have the child.”
Total myth and well documented as a myth.
“Are there differences between the Navy and other services since a US ship is always considered part of the US just like land within any state is ?”
That statement is totally and utterly wrong. The U.S. Supreme Court decisions have established that birth within the jurisdiction of the United States of America requires the birth to occur within the incorporated territories of the United States and within the jurisdiction of the Article III Federal Courts and not in the Federal territorial courts established in unincorporated U.S. territories or the courts martial of the Executive Branch of the U.S. Government.
I always thought it was US soil which means the actual place someone was born was the most important thing, not one or both parents being a citizen. If Cruz didn't fear that's what the courts would rule based on precedent, he'd wouldn't have any reason to have his records sealed, that's my opinion.