The designer released an updated version of this game as a free download under a Creative Commons "attribution non-commercial" license.
"I designed Vector 3 back in 1979, and am releasing it here for free under a Creative Commons "attribution non-commercial" license. Actually, I've made some fairly substantial changes to the game." "I've rewritten the rules extensively, both to eliminate old-school SPI legalese and make them more readable, and to make some changes that I think improve the game. Mainly, these increase the effectiveness of torpedoes and mines; the problem with games where there's no terrain, facing is unimportant, and there's no equivalent of the weather gauge, is that maneuver becomes irrelevant. The presence of missiles and mines at least gives some texture to space, and therefor a reason to maneuver."