This category should only contain other categories. Galleries should be in the corresponding categories instead. Files should be in a parent or subcategory.
How to create a category for a ship
A. When to create a category for a specific ship
If you know the name of a ship in a photo, you might want to create a category for the ship.
B. How to name the category
In general, name the category with the ship's name as painted on the vessel (when the picture was taken).
The general format for category titles is "<name of ship> (ship, <year>)". <year> is the year the ship was completed, see Category:Ships by year of manufacture for further information.
"<name of ship> (ship, <year>)" is a naming convention rather than a disambiguation rule. "(ship, <year>)" is added even if there is no other category named "<name of ship>". The "<name of ship>" may already mean ship.
Submarines use "<name> (submarine, <year>)" and tugs/towboats use "<name> (tugboat, <year>)". All other types are identified by category:Ships by type.
Fishing ships display their license number. Categories for these have the format "<license number> <name> (ship, <year>)" (see Category:Fishing vessels by license number).
If there are several ships with the same name built in the same year, the place where the ship was built/location of the shipyard is added: "<name of ship> (ship, <year>, <place>)".
In the rare case that there are several ships with the same name built the same year at the same place, the yard number is also added: "<name of ship> (ship, <year>, <place>, <yard number>)".
Sample: "E. R. Sterling (ship, 1883)" uses {{DISPLAYTITLE:Category:''E. R. Sterling'' (ship, 1883)}}. On the category description page, you will notice that this formats the page title as Category:E. R. Sterling (ship, 1883).