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 .

Backweight (or Deadman) rig.
Ubukhulu obungemva (okanye ukufa kwendoda).

A knowledge of the rate at which a ship gains or loses speed in different circumstances is invaluable when anchoring or when manoeuvring in confined waters or in company.

Ulwazi ngexabiso apho inqanawa zingenisayo okanye zilahlekelwe sisantya kwimeko ezahlukeneyo ezingeloxabiso xa okanye iceba emanzini okanye kwikampani.