Complex sentence: The tug remained on the bottom of Manila Bay until after the end of World War II. When the ship was salvaged it was renamed "Resolute" and continued operations in the Philippines into the late 1970s.
Split into simpler sentences: The tug remained on the bottom of Manila Bay until after the end of World War II. When the ship salvaged, it was renamed "Resolute". It continued operations in the Philippines into the late 1970s.