Ah TT,
C size is the ones used on the anchor cable.
When SBAC stopped sponsoring the AGS standards that threw us into a spin. There was two post pallets full at South Cerney (almost two tons of them) that went in the skip
I never saw one but the latest lanyard recovery lanyards were made from Kevlar. IIRC three different lengths in three colours, for long and short aircraft and where following loads. they were brought into service under a PURIBAD Mod on the J when we started doing double load split sticks. The Load lowering ropes from HAPES were being misused with no maintenance policy as they became more or less personal issue and never had a bay inspection.
I hope things are getting a little easier down your way TT.
BR
Drag