From Traveller Wiki - Science-Fiction Adventure in the Far future
The term is rooted in Caledonian naval antiquity, and is kept mostly for traditional reasons.
In Caledonian practice, Heavy Frigates serve as the screening force for Battleship squadrons. The role includes:
- Jumping in advance of a Task Force to cover its Jumping In point
- Covering a Task Force during jumping-out
- Covering a Task Force's battle squadron's flanks during fleet action
- Providing close reconnaissance for the Task Force.