Came across this on my travels around the internet CLIP which stands for Crew List Index Project concerns itself with merchant seafarers on British registered ships for the years 1861 to 1913.
This site provides guidance and finding aids to help you carry out your own research. The index itself is on FindMyPast, but this site might be a good place to start as it explains what crew list are and what you might find on them. Where the originals are held and finding aids are also included.
