航海

1. Origins, structure, and basic meaning

• Structure: 航海 is read as こうかい and means “voyage” and “navigation”.
• Basic usage: It denotes a captain recording a long voyage and brothers setting sail in a small sailboat.

2. Common pitfalls and similar expressions

• 航海の記録 / 航海に出る
  • Use 航海の記録 for a voyage record and 航海に出る for setting out.