Just a note as anyone that has spoken of the Shadow Swan seems to have made the mistake of saying its a small ship. It is quite a large ship for its time (and really the greatest size that is still practical and not just showing off). 300 oars is no small feat (considering every one of the oarsmen and the other crew need quarters) and would require a complicated arrangement (I imagine it as an early trireme).
Sorry if I didnt make the size clear in the first post! My fault!