We have debated this many times before, and it is clear that there are two main types who post on here, those who are happy with 600 photographs of the same ship, and those who prefer 600 photographs of 600 different ships, of different ages. I'm personally in the latter group.
Some people take photographs to post on here, and that is the main reason they take photographs. Others take photographs for their own benefit, and just post on here when they have the time etc. Again I'm of the latter. My pleasure comes from planning the trip, looking at, and photographing the ship, then sorting, cataloguing, and editing the photographs when I get home. Posting on here, or any other site or Facebook Group, is a minor part of my enjoyment.
I only post one shot per vessel unless it is something of significant interest. And I do check first to see if any similar shots are already on the site, and I don't post if there are. I am currently also posting scans of my older photographs, and, again only one shot per vessel name. But I don't expect everyone else to do the same.
However, there are many different views on this. When the site first started most members had very similar views on things like this, but, as the membership has increased, so has the number of different views on this, and other matters, such as deletions, and posting photographs of older vessels. As long as members are tolerant of other members views my view is that there is no issue, we should allow multiple shots of the same vessel, plus shots of older vessels, until such times as the server space starts to get full, then a decision may have to be made.