Complex sentence: With his chief engineer and the seven other crewmen on board, he had ballast pumped into the leeward bilge to lift the ship onto an even keel, and "Broompark" continued the voyage under its own steam.
Split into simpler sentences: With his chief engineer and the seven other crewmen on board, he had ballast pumped into the leeward bilge to lift the ship onto an even keel. The rest of the crew, and "Broompark" continued the voyage under its own steam.