| Acronym | Meaning |
| IMU | Inertial Measurement Unit |
| SPA | Steering Position Amplifier |
| GC | Gyrocompassing |
| R/T | Real Time |
| EA | Electronic Assembly |
| SFME | Storable Fluid Management ExPeriment |
| MPSR | Multipurpose Support Room |
| SSC | Shuttle System Contractor |
| NB | Navigation Base |
| RFP | Requirements And Formulation Phase |