Circling
Blip,
Your answer can be found in the Jeppesen manual under Air Traffic Control on page 212 (Although I an looking at an out of date copy at the moment).
Under PANS OPS 4 each cat of aircraft has not only a range of Vat but also a range of speeds for initial approach, final approach, circling, initial missed approach and final; missed approach. Please note that the data below is from my out of date page so should be used as an example only, but it is worth looking up next time you climb in the cockpit.
Cat C are;
Vat 121/140
Initial approach 160/240
Final approach 115/160
Max speed for vis man 180
Max speed for initial missed app 160
max speed for final missed app 240
Always check the bottom left margin of any Jeppesen plates you use to see whether the procedure is based on PANSOPS 4 or TERPS because the procedures have very different obstacle clearance margins. Particualrly when circling as, from memory only so please check before using these figures, PANSOPS allows Cat C to circle out to 4.3nm whilst TERPS only allows 1.7nm.
Although reading the Jepps can be tedious, there is some good gen in there.
If in doubt, go around and stay safe.
MM