Any military ship may fire as long as it has
at least one crew (which must be military, not civilians),
at least one gun,
-at least one shell (or shells within supply range),
+at least one shell,
and has at least 60% efficiency.
A ship's gun range is its firing range, as shown by
the show command, divided by two, times ((tech+50)/(tech+200).
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Any land unit may fire as long as it has
at least one military,
-at least one shell (or shells within supply range),
+at least one shell,
and has at least 40% efficiency.
A land unit's gun range is its firing range, as shown by the show
command, divided by two, times ((50+tech)/(200+tech)). A land unit