space sailor n.

We were playin' space sailor, an' Jimmy, here, says that there’s air out there… There ain’t any air out in space, is there?

Earthmen were fairly numerous in this main port of the planet. Swaggering space-sailors, prosperous-looking traders and rough meteor-miners made up the most of them. There were a few tourists gaping at the grotesque old black stone buildings, and under a krypton-bulb at a corner, two men in the drab uniform of the Patrol stood eyeing passersby sharply. Kenniston breathed more easily when he and the Jovian had passed the two officers without challenge.

Admiral Littlefield was a space sailor of the old school.

Originally, to explain my periodic absences…I passed myself off as a space sailor.