What does constrained by draft mean for a vessel?

The term "constrained by draft" specifically refers to a situation where a vessel has limited maneuverability because of the depth of the water it is navigating. When a vessel is constrained by its draft, it cannot safely move in certain areas where the water is too shallow for it to operate without risk of grounding. This concept is particularly important in coastal and harbor scenarios where the depth can vary significantly.

Understanding this term is critical for mariners, as it dictates how a vessel should communicate its limitations to other vessels in the vicinity, ensuring safe navigation. While tidal conditions can impact water depth and a vessel's ability to move, the correct interpretation relates directly to the inherent characteristics of the vessel itself and the surrounding water depths.