Masks of Nyarlathotep
Ships are the only reliable means of traveling around the world.
Journeys may take a few days to several weeks depending on conditions and connections.
Travel time will also be impacted by whether you opt for a passenger liner, freighter, or tramp steamer.
You also have a choice of what class to travel in on a passenger liner.
Out-of-game, the voyage may be glossed over or a session unto itself. If nothing of consequence happens, this may be a good time to regain sanity or improve a skill.