Sorry Ron, think you might have that a wee bit wrong.
I-tech is subsea 7’s drill support division. It was originally spun off to make it easier to flog to someone(probably Oceanqueerthing) but they’ve either had a rethink, or no-one wants to buy it.
Subsea use all their own design of vehicles, apart from a few they’ve picked up through company aquistions.(olympians, demon and diablo. they’ve even got an old MRV)
The Herc’s are the probably the pick of the bunch, and are generally found on the construction vessels. The centurions started out as super scorpios a long time ago, but have been upgraded till I thnk only the pods are still original. Pioneers are the same idea – they use the old scorpio control system!
The link to SMD is that they’ve started farming out the production of new ROV’s to them in much the same way as Acergy has Schilling build the new ACVs