I ran my character for 1km on the airfield and figured out roughly what speed he's going.
While wearing gear, and using standard run( not sprint) he goes 1Km in 3.30, which translates to around 10.5 mph,
Without gear (no equipment except clothing), he does the same run in 3.54 which is around 9.5 mph.
I think these running paces should probably be switched around!
Also tactical pace came in at around 7mph which is way too fast running around with your weapon at the alert.