[klambie]

I was curious to see if an answer to the original question might pop up, but I'll throw out a theory in place of real information. Perhaps someone with a better understanding how trades worked during this period can confirm or deny.

Rather than indicating a type of vehicle, is it possible that Dvr-Mech Class III is just an indication of his experience and progression within the Dvr-Mech trade? I presume Class III to be the entry level of the trade, with Class II and Class I possible. I base this on seeing individuals qualified as Clerks Group 'C' qualifying as Clerks Group 'B' after a period of time with a unit and presumably doing some tests, etc. I've similarly seen this for Cooks as well. In those cases at least, Class III does not seem to speak to the equipment they are qualified on.

I'm also reasonably certain that I've seen 'Group' and 'Class' used interchangeably as well as 'III' and 'C'. So I would guess that a Dvr-Mech Class III is the same as a Dvr-Mech Group 'C'.

Any additional info appreciated.