Submarines have a very limited range for what ships they
can see using their periscope--they can usually only see ships in the
same sector. However, all ships (including subs) which are docked in
-a harbour are visible to all ships (including subs) in adjacent sectors.
+a harbor are visible to all ships (including subs) in adjacent sectors.
(see also \*Qinfo sonar\*U)
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