🔍 Key Concepts

• Meaning of double bottom construction in shipbuilding • What part of the ship is called the tank top • How the shell plating and internal structure create enclosed spaces

💭 Think About

• Visualize a cross‑section of a ship’s bottom: where would an ‘inner’ bottom logically be located in relation to the outer shell? • Which option describes a continuous surface strong enough to walk or stow cargo on, and which options describe just spaces or parts? • Ask yourself: is the ‘inner bottom’ a surface (plating/deck) or an empty compartment/void?

✅ Before You Answer

• Identify which choice refers to a continuous plating surface rather than just an empty space • Check which option matches what you’d see as the uppermost surface of the double bottom tanks inside a cargo hold or machinery space • Eliminate any option that wrongly equates ‘inner bottom’ with the side shell instead of the bottom structure