### L359 Obstacles Sailors Might Face > Quite apart from navigational hazards like fog and unmarked rocks, headwinds could delay a passage for weeks. Pirates could descend without warning. Seasickness was a universal complaint, so much so that the Catalan Customs of the Sea ruled that agreements made at sea were invalid, because some passengers would promise a thousand marks of silver to anyone who would put them ashore. - [[Beyond the Blue Horizon by Brian Fagan#L359 Obstacles Sailors Might Face|View in Vault]] - fog - rocks - headwinds - pirates - seasickness The Catalan story is a good [[Newsletter Ideas]] – seasickness topic, maybe?