The Type 81, or Tribal class, frigates were ordered and built as sloops to carry out similar duties to the immediate post-war improved Black Swan-class sloops and Loch-class frigates in the Persian Gu
The Leander-class, or Type 12I frigates, comprising twenty-six vessels, was among the most numerous and long-lived classes of frigate in the Royal Navy's modern history. The class was built in three b
HMS Apollo, 1976
Aerial view of HMS Penelope in 1970, showing the original layout of the class before conversion