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This is a tracking category. It is used to build and maintain a list or lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme.
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Populated by {{Ship}}
and individual ship-prefix templates like {{HMS}}
when errors in a template's parameters are detected. These templates take the forms:
{{ship|<prefix>|<name>|<disambiguator>|<format control>}}
{{HMS|<name>|<disambiguator>|<format control>}}
When errors are detected, the templates emit error messages in the forms:
where the help link links to this page.
The messages are:
{{ship}}
only – this message is emitted when the |<prefix>
positional parameter is present but empty AND |<format control>
positional parameter is set to 5
or 6
OR when |up=yes
|<name>
positional parameter|<format control>
positional parameter is 1
, 3
, or 5
the template requires a value in |<disambiguator>|<format control>
positional parameter holds a value that is not 1
, 2
, 3
, 5
, or 6
; the invalid control parameter is specified in the error message