| Acronym | Meaning |
![](file.png) | PCN | Program Change Notice |
![](file.png) | SW | Software |
![](file.png) | NTHG | Nothing |
![](file.png) | CCMM | Course Curriculum Model Manager |
![](file.png) | TTD | Technical Training Device (simulation System) |
![](file.png) | RXMT | Retransmit |
![](file.png) | ESM | Electronic Support (surveillance) Measures |
![](file.png) | RESOLV | Resolver |
![](file.png) | NARF | Naval Air Rework Facility (renamed- Nad -1987) |
![](file.png) | MTBERA | Mean Time Between Essential Replacement Action |