The strait provides a well-protected inland waterway sheltered from rough weather and high seas, allowing for safe navigation. Ships sail through the strait from the Pacific to the Atlantic and back, from the oceans to the Beagle Channel through the Magdalena Channel, Cockburn Channel, Paso Brecknock or Canal Ocasión, Ballenero Channel, O'Brien Channel, Paso Timbales, northwest arm of the Beagle Channel and the Beagle Channel and back, and also to cross the strait from north to south and back.[clarification needed] This is the case for all traffic between the Chile and Argentina and the cities in Tierra del Fuego, Porvenir, Cerro Sombrero, Timaukel, Ushuaia, and Río Grande.