to get away from a place where you are not allowed to leave
escape
to understand
realize
to sail along, over or through a sea, river etc. / to direct the ship
navigate
to damage a boat or ship so that it goes below the surface of the sea, etc.
sink
a fight between armies, ships or planes
battle
a feeling of being unhappy because you have no friends or people to talk to
loneliness
without help from anyone else
single-handed
making somebody feel extremely frightened
terrifying
that cannot be trusted; intending to harm you
treacherous
the state of being very tired
exhaustion
without any stops
nonstop
lit by the moon
moonlit
to sail all the way around the world
circumnavigate