Nautical Term: Main breadth line
Definition of Main breadth line
The main breadth line refers to the ship’s widest point at the midships section. This measurement is significant because it determines the overall size and proportions of the ship.
For instance, imagine a historical account of a voyage aboard a 17th-century galleon. In this context, the main breadth line would be an essential factor in understanding the ship’s size, stability, and seaworthiness.
If the ship’s sides were to collapse inward, creating a condition known as tumbling home, the main breadth line would no longer represent the ship’s widest point. Instead, the line would be considerably below the bulwarks, providing a clear indication of the ship’s compromised structural integrity.
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