In this task, you are given a sentence or phrase in English. You must translate it to Xhosa in a way that is equivalent in terms of meaning and grammatically correct.

The Holland-type submarine and the Wright brothers' aeroplanes were the first practical machines in their respective fields.
Uhlobo lwenkwili zeHolland noonyana beWright zenqwelo moya zazizezokuqala zomatshini abasebenzayo zecandelo ngalinye labo .

The volume of fluid displaced by a freely floating and unrestrained vessel, the weight of which exactly equals the weight of the vessel and everything on board at the time the displacement is recorded. Displacement is expressed in either cubic feet or in tons of salt or fresh water.
Umthamo wefluwidi oshenxiswe ngokudada okukhululekileyo nenqanawe engathintelwanga, ubunzima obulingana twatse nobunzima benqanawe kunye nento yonke esenqanaweni ngexesha kubhalwa ukushenxisa.

This is in order to go to the rescue of any bather in difficulties.

Le yenzelwa ukuba ukwazi ukuya kuhlangula nawuphina umqhubi osebunzimeni.