The twin ships, displacing 12, 500 tonnes unladen but 31, 500 tonnes when fully loaded, are designed to refuel and restock warships of the Royal Navy and allied navies while at sea.
Economy over the period of mixed driving both laden and unladen was 43 mpg.
We managed to realise over 30 mpg too, running mainly unladen , so the Brava's greatest - and some fleets would say only - advantage is retained.
It is a lively performer, the handling is good with masses of front end grip and the ride is impressive when unladen .
Both 4x2 single and crew cabs boast an unladen fuel consumption of 45.6mpg on the extra urban cycle.
The container ships bringing in vital supplies of roof slate are sitting at the docks unladen .
These are good figures for a vehicle weighing 1560 kg unladen .
The two carriages, each the size of a single-deck bus and weighing 13 tons unladen , arrived in Aviemore borne aloft on a matching pair of stately low-loaders after a journey of some 1,200 miles.
The expanding deck offers the additional benefit of no escort requirements when unladen .
An unladen heavy duty trailer with camper weighs in at around 500 kg bare.