Another Tech Level C large naval, this time modelled after the Point class of RoRo vessels that are owned by the British military and partially chartered out to civilian service. Engine and fuel match up exactly, as do even crew numbers - although the fuel load only if we assume that supercharger use does not increase fuel consumption (i've so far not found any indication otherwise).
The vehicle load is a bit iffy, but actually surprisingly matches up very well too: The Point class may carry 189+189 trailers on two decks, while giving a capacity of 8000 tons. If we assume tractor-trailer combinations at the exact average of a medium wheeled support vehicle - 42.5 tons, which is realistic for current vehicles - then we get exactly 188 tractor-trailer combinations.
Vehicles are loaded as cargo, not in bays in order to get the numbers and since despite it being called roll-on-roll-off it's not like you can drive a vehicle off the ship straight onto the highway. The 35-minute checkup maintenance prescribed by SO sounds about right as a delay after unloading.
Since the Point class are notionally military, while they are not armed, they carry a helipad and hangar space for four helicopters. This is reflected here as well. The container cargo capacity - imagine them just planted on the top deck - is an extra for the Stone class (technically making her a ConRo), and used to round out full deep load capacity.
[ Stone class RoRo Transport Vessel ]
Tech Level C / Template D
Displacement : 23,000 tons full / 8,816.5 tons light
Crew : 22 (4 officers + 18 enlisted) (incl. 8 air crew for VTOL)
Passengers : 12
Surge : 20 in bays (embarks e.g. maintenance team for VTOL)
Endurance : 6 months at sea (2 months with maintenance team onboard)
Range : 17,000 km at 17.5 knots / 32.4 km/h
-- Ship and Equipment --
4496.5t - chassis
3312.0t - engine: 2/3 ICE
331.5t - supercharger : Sprint 4
170.0t - steerage quarters (34)
500.0t - Helipad
200.0t - light vehicle bays (for 4 VTOL)
1.0t - communications equipment
2.5t - armor (156 points BAR2 primitive)
3.0t - lift hoist
--- Supplies ---
5630.5t - fuel (for 17000 km)
24.0t - supplies for VTOLs (6t each)
31.0t - consumables (for 6 months)
138.0t - spare parts (for 6 months)
--- Cargo ---
8000.0t - vehicle cargo (188 average medium wheeled)
160.0t - container cargo (16 containers)