潜水艦

1. Origins, structure, and basic meaning

• Structure: 潜水艦 (せんすいかん) is a compound noun for a naval vessel designed to travel underwater.
• Basic usage: 潜水艦が海へ潜る makes the story’s vessel the moving subject, while 潜水艦の内部を再現した模型 makes a museum model of an old submarine interior the object viewed.

2. Common pitfalls and similar expressions

• Vessel and reconstructed interior model
  • The physical object in 潜水艦の内部を再現した模型 is a 模型, not the submarine itself. It should not be read as a model descending into the sea like 潜水艦が海へ潜る.