| Acronym | Meaning |
![](file.png) | FM | Frequency Modulation |
![](file.png) | ATIS | Advanced Technical Information System (navsea) |
![](file.png) | ABIU | Avionics Bay Interface Unit |
![](file.png) | ECS | Environmental Control System |
![](file.png) | LCPL | Landing Craft, Personnel, Large (mk 12) |
![](file.png) | AC | Armament Computer |
![](file.png) | HK | Hook |
![](file.png) | DPT | Deployable Proficiency Trainer |
![](file.png) | SSBN | Trident Submarine |
![](file.png) | YTB | Large Harbor Tug (self-propelled) |