Algol IIIA is the exact solid first-stage motor used in Scout G-1 and Scout D-1 configurations, retained separately from other Algol variants. NASA's Scout G-1 characteristics identify an average thrust of 467.1 kN and a nominal burn time of 56 seconds. NASA's historical Scout table identifies United Technology Center as the first-stage propulsion contractor; no exact canonical AeroVia company record is available, so developer and manufacturer links remain empty. NASA records the final Scout launch on 5 August 1994, so this Scout-specific motor designation is marked retired without generalizing that status to every Algol derivative.