Quarantine: A
restraint placed on an operation
to protect the public against a
health hazard. A ship may be
quarantined so that it cannot
leave a protected point. During
that period, the Q flag is
hoisted.
Quoin: A wedge-shaped
piece of timber used to secure
barrels against movement.
Quota: The quantity of
goods that may be imported
without restriction or
additional duties or taxes.
