The "Voyager of the Seas" in Wellington - It's been a while ago.
Wellington is, in fact, very bad for photographing ships in harbor. There is no place opposite the quays which one could use to get a good view at all. There is a path and some patches of land along the motorway, "sort of" accessible, but due to the angle you would have to venture along the motorway for quite some distance, and you would still get just a view on the stern of those ships.
Somes Island would be a good angle, in the middle of the harbor, but it's pretty distant and you can't just drive there when a ship is in and the weather is right.
I went to Massey Memorial, on Miramar Peninsula, and set up my biggest lens - 150-600 millimeter focal length. The distance to the ship is close to 4 kilometers. With this piece of gear I could actually zoom in to a level, where you can see actual people on the rail and behind the windows, I spotted one person who looked like taking a photo towards my direction.
This also means, the ship was too big, even on this distance, to fit into one zoomed frame. But wanting this level of detail, I decided to do a panorama, ended up with 9 shots and stitched them together.
Below you see the final image, and also 2 crop outs of some detail on 100% resolution - this level of detail would need a decent size of print btw.
Here some crops and a map of the available locations (the green arrow marks my angle and position). The first crop shows people behind those windows taking pictures themselves - not too bad for a 4 KM distance aye?