In 1980, Games Designer Workshop published High Guard, the fifth Traveller book. In its 52 pages, it outlines character and skill generation for Space Navy personnel, and details on how to construct large starships of up to a million tons.[1]
In the May-June edition of The Space Gamer (Issue No. 28), Forrest Johnson was not a fan, saying, "Unfortunately, the new rules do violence to the system from Book 2 and the laws of physics."[1]
In the August 1980 edition of Dragon (Issue 40), Roberto Camino welcomed the addition of large starships to the Traveller game, but noted a design decision that he called questionable: that the number of minor weapons do not increase at the same rate as the ship's surface area, so larger ships, which should have more firepower, actually have less "punch" than smaller ships. Despite this, Camino believed that the construction system "worked well."[2]
In the August-September 1980 edition of White Dwarf (Issue 20), Bob McWilliams liked both the increase in ship size available, as well as the combat rules for naval fleets.[3]