3
Returns the length of the first word (i.e. the number of characters before the first space) if that word is one of the ship prefixes listed in the template code; returns 0 otherwise. For example:
{{Ship prefix|HMS Victory}}
returns 3 ("HMS" is listed){{Ship prefix|German battleship Tirpitz}}
returns 0 ("German" is not listed)For use in Template:Infobox ship begin, for italicizing titles of ship articles.
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