I had no such nice things like internet and online manuals, when somewhere in 1986 I bought my first computer (a C64) and with it a bunch of unknown (and partially dubious origin) floppy discs. No manual, no nothing. Elite was one of the first games that I pulled out of this chaos, at least the first one that really and dramatically made me interested then addicted. If you want to be in my shoes, then try to solve this riddle without ever looking into a manual. Good luck...