Answer:
The Catalan Atlas did not provide sailors in the fifteenth century with important information such as longitude, ocean currents, variations in climate, and detailed port information that would have made their voyages safer and more efficient.
Step-by-step explanation:
The Catalan Atlas was a medieval map produced in 1375 in the Majorcan cartographic school. While it was a significant advancement in cartography, it did not provide sailors planning to explore in the fifteenth century with certain valuable information. Some of the information not provided by the Catalan Atlas includes:
Longitude: The concept of longitude was not yet developed during the time the Catalan Atlas was created, so the map does not provide information on longitude. This made it challenging for sailors to navigate accurately on long voyages since they had to rely on dead reckoning, celestial navigation, and other methods that were not as precise as knowing one's exact longitude.
Currents: The map did not provide information on ocean currents, which are crucial in determining the speed and direction of a ship. This lack of information made it challenging for sailors to plan their routes and anticipate the time required for a voyage accurately.
Variations in climate: The map did not provide information on variations in climate and weather patterns, which would have been useful for sailors planning to navigate in different seasons or areas. Without this information, sailors had to rely on their experience and intuition, which could be unreliable.
Port information: The map did not provide detailed information on ports and harbors, such as the depth of the water, the location of shoals, and the availability of provisions and repairs. This made it challenging for sailors to find safe harbors during storms or to stock up on supplies during long voyages.
In summary, the Catalan Atlas did not provide sailors with valuable information such as longitude, ocean currents, variations in climate, and detailed port information that would have made their voyages safer and more efficient.