Tri-hy station
Tri-hy stations were supporting facilities of the Utopia Planitia Fleet Yards complex on Mars. By 2385, tri-hy station crews were supplemented with synth labor, including the A500. The stations were divided into sectors, with directors, Synthetic Personnel supervisors, recreational areas, and alpha and beta shifts.

On First Contact Day in 2385, all but one of the Utopia Planitia tri-hy stations had off, while tri-hy station A19 continued to operate on a skeleton crew. It was on this day that synth laborer F8 of station A19 was compromised by the Zhat Vash and lowered the planetary defense system, precipitating the attack on Mars. ()

Station types