Crossing oceans in earlier times was incredibly challenging due to multiple factors:
Sailors lacked precise tools like compasses and accurate maps, relying on celestial observations and dead reckoning, which were error-prone and could lead to detours or becoming lost.
The oceans were largely unexplored, and their vastness and unfamiliarity brought uncertainty and danger. Sailors were unaware of currents, winds, and hazards, making safe route planning difficult.
Early ships were relatively small, made of wood, with limited cargo capacity and maneuverability, making them vulnerable to storms, strong winds, and rough seas.
Preserving food and water for long voyages was a major challenge. Without refrigeration, fresh supplies spoiled quickly, leading to malnutrition, scurvy, and other health issues.
Ships were crowded, unsanitary, and humid, facilitating the spread of diseases like yellow fever, smallpox, malaria, and dysentery, which could decimate crews.
Sailors had little understanding of ocean currents, winds, and weather patterns, making it hard to predict and navigate around storms, resulting in delays and increased risks.
Storms, icebergs, and fog posed significant dangers to sailing vessels, potentially disrupting voyages and causing loss of life and ship damage.
Pirates and hostile encounters with indigenous populations added danger and uncertainty, requiring constant vigilance and readiness to defend against attacks.
Despite these challenges, the human drive for exploration and trade motivated people to overcome the arduousness of ocean voyages, advancing navigation, cartography, and shipbuilding technologies.