Complex sentence: As a result, the later lifeboats had a shortage of trained seaman to man them and instead a few stokers or even victualling stewards (some of which had no experience with lifeboats) were ordered to man the launching and rowing of the boats.
Split into simpler sentences: As a result, the later lifeboats had a shortage of trained seaman to man them. So instead, a few stokers and even victualling stewards (some of which had no experience with lifeboats) were ordered to man the launching and rowing of the boats.