Why the Columbia River is so challenging

I talk about this topic from time to time on the show, because there are so many facets to it. Today we’ll take a look at the challenges the river poses for arriving ships, from the unusual underwater geology offshore, to the daunting currents along the winding river corridor. It’s a matter for experienced marine pilots who make critical navigational decisions on the fly every day.

What we know about the Carnival Panorama cruise ship's return to Astoria.