潜航

1. Origins, structure, and basic meaning

• Structure: The navigation noun and する verb 潜航 (せんこう) means traveling underwater in a submarine or submersible.
• Basic usage: A craft can 海底近くまで潜航する, and training may cover 夜間の潜航手順.

2. Common pitfalls and similar expressions

• Navigation while submerged
  • It focuses on navigating while submerged, not only on the moment of diving below the surface.