A ship structure is always defined in terms of its basic dimensional parameters such as length, breadth, depth, and draft. Many people unfamiliar with technical maritime terms also understand these simple terms. However, delving deeper, these terms have somewhat clear implications and classifications that many people need to become more familiar with.
For instance, length can be further segregated as Length Overall (LOA), Length Between Perpendiculars (LBP), and Length of Waterline (LWL). All...
https://www.marineinsight.com/naval-architecture/understanding-the-beam-of-a-ship/