How can floating lights be moved to mark shifting sandbanks and safe channels?

Floating lights, which include lightships and buoys, are essential for coastal navigation because of their inherent mobility. Unlike permanent lighthouses, these floating aids can be readily redeployed to accommodate the dynamic nature of the sea, such as the shifting of sandbanks over time.12

Because they are not fixed structures, they can be moved to ensure that safe channels remain correctly marked for vessels, particularly those with deep drafts. Lightships, for instance, are typically towed into their required positions and secured using a single chain and anchor. This ability to be repositioned allows maritime authorities to adjust navigational markers as hazards move or traffic patterns change, ensuring continued safety in congested waters or harbor approaches.2314