Type 12 Frigates were constructed to specialised designs, which although
effective, were also expensive.
So the Leander's were constructed to a general purpose design, with
standardised weapons and sensors. They were very successful, and produced
in greater numbers than any other post WW2 design.
Batch 1 Ships
Accommodation was greatly improved (compared to Type 12's), and
engines were of a new Y110 design. All were built with Variable Depth
Sonar (VDS) wells, and all except Ajax, Euryalus and Galatea
also received the sonar fit. All batch 1 ships were refitted with the
Ikara anti-submarine rocket, which replaced the original 4.5in guns.
Batch 2 Ships
Were built to the batch 1 design but with a different engine layout
known as the Y136 design. They were refitted with 4 Exocet's, replacing
the 4.5in gun. Although all were completed with a VDS well, only
Cleopatra received the sonar equipment.
Batch 3 Ships
Although based on the previous ships, they had an increased beam, to
improve stability and internal space. Five were refitted with Exocet and
Seawolf, and all received an extra 20mm gun. The machinery was known as
the Y150 design.
Scylla, Achilles, Diomede, Apollo and Ariadne
were completed without a VDS well.
- Class Ship