Which vessel should not impede the navigation of a power-driven vessel?

In the context of maritime navigation rules, a seaplane should not impede the navigation of a power-driven vessel because seaplanes operate primarily in the air and only occasionally interact with the water during takeoff and landing. Unlike vessels like cargo ships, sailing vessels, or tugboats, which are designed to navigate the waters and regularly share the marine environment with power-driven vessels, seaplanes do not pose the same level of risk for collision or interference. Power-driven vessels are generally expected to maintain the right of way against other maritime traffic that navigates on the water.

Cargo ships, sailing vessels, and tugboats are all considered vessels that navigate the water and can present challenges for power-driven vessels to maneuver around. Thus, they are governed by various rules regarding right of way and safe navigation protocols. In contrast, a seaplane is not a vessel moving through the water in the same manner and has different operational constraints, making it less likely to impede the navigation of other vessels.