 The cooperation led to hybridized assembly operations such as installation of the docking module atop the Orbiter Docking System on STS-74.This blurred common distinctions between berthing and docking, being positioned by the RMS but actuated by Orbiter thruster firings.Both CBM specifications were completely re-written in 1995 (PCBM) and 1996 (ACBM) as part of the transition process.