Complex sentence: The 1200 horse-power engine provides the Wyola with of a speed of 11.5knots additional she was fitted with a powerful salvage pump making her one the most powerful tugs in Australia at that time.
Split into simpler sentences: The 1200 horse-power engine provides "Wyola" with of a speed of 11.5 knots. She was also fitted with a powerful salvage pump, making her one the most powerful tugs in Australia at that time.