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navigation channel
noun
head of navigation
noun
(nautical)
The
farthest
point
above
the
mouth
of
a
river
that
can
be
navigated
by
ships.
This
term
can
be
somewhat
subjective
on
many
streams,
as
this
point
may
vary
greatly
with
the
size
of
the
ship
being
contemplated
for
navigation.
On
others
it
is
quite
objective,
being
caused
by
a
waterfall,
dam
or
lock.
satellite navigation
noun
navigation mesh
noun
navigation light
noun
freedom of navigation
noun
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