| Int'l | Motor | Burn Date | Result | Usage | Launch |
| Desig. | Vehicle | ||||
| Unknown: Classified Titan II SLV payload orbit insertion motor (possibly LAE) | |||||
| 1988-078A | ? | 1988 Sep 5 | S | USA 32 motor | Titan 23G-1 |
| 1989-072A | ? | 1989 Sep 6 | U | USA 45 motor | Titan 23G-2 |
| 1992-023A | ? | 1992 Apr 25 | S | USA 81 motor | Titan 23G-3 |
| Int'l | Motor | Burn Date | Result | Usage | Launch |
| Desig. | Vehicle | ||||
| Unknown: Classified payload perigee motor (probably Orbus 6) | |||||
| 1989-061D | ? | 1989 Nov 15: | S | USA 40 PKM | STS-28R |
| 1990-097C | ? | 1990 Nov 16: | S | USA 67 PKM | STS-38 |
| 1992-086C | ? | 1993 Feb 18? | S | USA 89 PKM | STS-53 |
| 1996-038C | ? | 1996 Jul 3 | S | USA 125 PKM | Titan 45K-2 |
| Int'l | Motor | Burn Date | Result | Usage | Launch |
| Desig. | Vehicle | ||||
| Classified payload apogee motor (possibly Aerojet SVM-3) | |||||
| 1970-046A | ? | 1970 Jun 19 | S | AFP-720 AKM/RH-1 | Atlas Agena D 5201A |
| 1972-101A | ? | 1972 Dec 20 | S | AFP-827 AKM/CY-5 | Atlas Agena D |
| 1973-013A | ? | 1973 Mar 6 | S | AFP-720 AKM/RH-2 | Atlas Agena D |
| 1975-055A | ? | 1975 Jun 18 | S | AFP-827 AKM/CY-6 | Atlas Agena D |
| 1977-038A | ? | 1977 May 23 | S | AFP-827 AKM/CY-7 | Atlas Agena D |
| 1977-114A | ? | 1977 Dec 11 | S | AFP-472 AKM/RH-3 | Atlas Agena D |
| 1978-038A | ? | 1978 Apr 8 | S | AFP-472 AKM/RH-4 | Atlas Agena D |
| Int'l | Motor | Burn Date | Result | Usage | Launch |
| Desig. | Vehicle | ||||
| Classified payload apogee motor (or possibly LAE) | |||||
| 1985-010B | ? | 1985 Jan 25: | S | USA 8 AKM | STS 51-C |
| 1989-090B | ? | 1989 Nov 24: | S | USA 48 AKM | STS-33R |
| 1990-097D | ? | 1990 Nov 16: | S | USA 67 AKM | STS-38 |