what are all of the ship classes?
rari class, malabar class, ut507 class, ut515 class, ut710 class, ut711 class, ,
what about their displacements?
1,450 tonnes, 1,440 tonnes, 1,500 tonnes, 4,000 tonnes, 2,100 tonnes, 2,000 tonnes, 2,250 tonnes,
and which displacement is associated with the rari class?
1,450 tonnes