I am an Army Brat. My folks were stationed in Sagamihara and later, Yokohama 1951-1961. I was 13 years old on the last trip home on MSTS (the Army’s Navy.)
In the ten years for various reasons, My mom and I made six back and forth trips on five different ships. Each was Seattle-Yokohama or Yokohama-Seattle, except for the last final trip into Oakland. This was aboard the General W. A. Mann.
East trip took two weeks.
Wow! That must have been something as a kid! By the time my family did its globetrotting when I was a Navy Brat, we went on MAC flights. (I lived in Yokosuka for a few years...)