Complex sentence: A Royal Navy vessel was readied and left the nearby port of Lowestoft lest the R33 came down in the sea, the local lifeboat launched but was driven back in the face of the weather conditions.
Split into simpler sentences: A Royal Navy vessel was readied and left the nearby port of Lowestoft lest the R33 came down in the sea. The local lifeboat launched but was driven back in the face of the weather conditions.