Aids to navigation marking the intracoastal waterway can be identified by __________.

Correct Answer: Option C — yellow stripes, squares, or triangles marked on them

Aids to navigation on the Intracoastal Waterway (ICW) are distinguished by yellow markings. These include yellow squares on port-hand aids and yellow triangles on starboard-hand aids. These symbols allow mariners to easily identify aids that serve the ICW, which often share structures with standard lateral aids in shared waters.