I.S.P.M.V.: Tethys
I.S.P.M.V.: Tethys is a role-playing game supplement for "Traveller" published by FASA vin 1980. Contents. "I.S.P.M.V.: Tethys" is a book containing plans for the "Tethys", a 1000-ton "Interstellar Para-Military" Q-ship that carries six pinnaces and a squadron of troopers. The supplement is based on the spaceship creation rules originally published in "". In addition to the rulebook, the supplement includes seven pages of 8" x 16" blueprints in 15 mm scale for the "Tethys", and a sheet of additional descriptions. Publication history. "I.S.P.M.V.: Tethys" was written by Jordan Weisman and was published in 1981 by  FASA as a pamphlet, and seven 11" x 17" map sheets. Reception. In the June 1981 edition of "The Space Gamer" (Issue No. 40), Richard A. Edwards found the supplement lacking. ""Tethys" seems incomplete. Perhaps, with a lot of work, it could be usable for miniature play or to provide a platform for a shoot-out in space. You'd probably be better off saving up for "Azhanti High Lightning"." In the July 1981 edition of "Dragon" (Issue #51), Tony Watson also questioned the value of the supplement for referees who enjoyed creating their own work: "If the referee is  conversant in constructing vessels that the players enjoy and has a sufficiency of such ships, then he probably should not buy these playing aids. But if for any reason he finds new ships attractive, these are good candidates."