GB1PF represents Palmerston Forts, the historic Victorian military defence buildings which encircle the City of Portsmouth on the South coast of England.
  Annual operations take place by the club from either Fort Purbrook or one of the many other local Palmerston Forts or Victorian Defence Structures.
  Activating GB1PF gives operators the chance to team-up with fellow club members for logging and to practice anonymously, for example, Morse code or phone. Thousands of GB1PF contacts have been logged onto QRZ.com.