I think that before the site standards can be properly reviewed and set, there needs to be a clear definition of exactly what the site is about, particularly around photographs. There seems to be two basic schools of though on this amongst members, judging by this, and other recent forum topics. There are those who think that the standard of photographs should be high, and those who feel that there should be a bit of flexibility around the standards, without it being a total free for all.
Once you have established this definition the standards can then be set to meet that, but, until you do that it will be very difficult to set any meaningful ones. Define the site, then define the standards to meet that.
I'm in the latter camp, after all the site is called Shipspotting.com, not Excellentshipphotography.com, but I accept that others won't share that view.