What kind of boat holds the most weight?

The type of boat that holds the most weight is typically a barge. Barges are flat-bottomed vessels designed for transporting heavy cargo, often on inland waterways. Their large surface area and stable design allow them to carry substantial loads, making them ideal for moving goods like coal, grain, and construction materials. Other heavy-duty vessels, like oil tankers and freighters, can also carry significant weights but are designed for different types of cargo and conditions.