The reserve buoyancy of a submarine when on the surface, measured by the capacity of the main ballast tanks, is much smaller in proportion to the surface displacement than in surface ships.
Amandla agciniweyo ekudaela kwenkwili xa ingephezu kwamanzi, ulingonie nyendawo iTanki elinzime elime kuye, incinci kakhulu ngokomlinganisele kumangathe osetyenzisiwayo phontsi kwemanzi nakunenqonawe ezihomba nyaphezulu kwamanzi.