What do we call a long trip by sea to trade or raid (common for Vikings)?

The story behind the answer

It specifically denotes a long sea journey, which fits Viking activity: they crossed open waters to reach distant shores for commerce or sudden attacks. By contrast, an expedition is an organized mission that can be by land or sea, a journey is any travel, and a raid is the short, violent act at the destination—not the trip itself.

Norse seafarers mastered the North Atlantic with sleek longships for speed and shallow rivers, and broader cargo ships (knarr) for trade. They sailed from Scandinavia to the British Isles, Frankish coasts, and up Russian rivers to Byzantium and the Caliphate, and even reached Iceland, Greenland, and briefly North America. Using sunstones, coastal landmarks, and experience, their sea-borne ventures spread goods, ideas, and fear across medieval Europe.