Whereas size and speed, which are two aspects of specialisation, affect all parts of the hull, differences in the cargo-carrying requirements usually require only different mid-bodies.
Ngexa umlinganiselo kwakunye nesantya, kuba izezona zinto zijongekileyo zobuchule, zibandakanya zonke izahlulo zomzimba wenqanawa, izinto ezahlukeneyo kwiimfuneko zokuphathava kwemithwalo ezisoloko zifuna imizimba ephakathi okanye esembindini eyahlukeneyo.