Complex sentence: By 9 pm, conditions had become very stormy, and her sails were taken down; by the time she reached Formby, the ship could no longer be steered, and the tow line was also lost.
Split into simpler sentences: By 9 pm, conditions had become very stormy, and her sails were taken down. By the time she reached Formby, the ship could no longer be steered, and the tow line was also lost.