This is the 9675th most frequent Japanese word.
航海
Voyage or navigation.
The word '航海' is used here to describe an extended journey on a ship or by sea.
彼は長い航海の旅に出ました。
He embarked on a long voyage.
In this context, '航海' refers collectively to the practice and history of sea travel and navigation.
航海の歴史は人類の進歩を物語っています。
The history of navigation tells the story of human progress.
Here, '航海' specifically denotes the journey itself, emphasizing its operational aspect and associated responsibilities.