Perimeter Action Group 31 (also known as PA Group 31) was a Starfleet battle force extant in the late 23rd century. (Ships of the Star Fleet, vol. 2)
PA Group 31 consisted of USS Akyazi, USS Beuel, USS Armavir and other vessels. In the early 2290s, the group was homeported at Star Station Praeses.
- Perimeter action groups may have been the counterpart of what were called pursuit groups in other continuities.