As many of you will know I help run the
www.trawlerphotos.co.uk website which is mostly dedicated to fishing vessels of all types and all dates ( from sailing vessels to the very latest of the super trawlers ). In the last 2 weeks I have finally had the chance to re-organse the gallery's so we now have all of our non-fishing vessels in discrete gallery's ( coasters / cargo / tankers /tugs / etc ).
I can recommend 2 other websites for general marine photographs :
www.shipspotting.com and
www.shipsnostalgia.com ( if you are looking for fishing vessel photos you have to opt-in to the shipsnostalgia gallery after joining ).
The shipspotting site does not have compulsory membership to access their gallery's but the shipsnostalgia website does.
Davie