Complex sentence: This was repaired with the use of a metal mechanical device called a jackscrew, which had been loaded on board to help in the construction of settler homes and now was used to secure the beam to keep it from cracking further, making the ship seaworthy enough.
Split into simpler sentences: This was repaired with the use of a metal mechanical device called a jackscrew, which had been loaded on board to help in the construction of settler homes. It was now used to secure the beam to keep it from cracking further, making the ship seaworthy enough.