Final answer:
The question pertains to the limitations of a power-driven vessel's movement due to its draught and the depth and width of navigable water. It highlights the importance of understanding a vessel's physical restrictions for navigation and seamanship.
Step-by-step explanation:
The question describes a power-driven vessel that has a deep draught relative to the depth and width of navigable water, which hampers its ability to change course easily. Such a vessel is severely restricted in its movement because the water depth is not sufficient for it to navigate freely without risking running aground. This reflects how mariners must account for the physical limitations of their vessels in relation to the environment. The passages provided depict various nautical scenarios where seafarers face challenges maneuvering their vessels in difficult conditions, whether due to waves, currents, or the vessel's own size and handling characteristics. In the context of maritime geography and navigation, understanding the dimensions of the vessel relative to the navigable waters is crucial for safe and effective seamanship.