Zhuge Liang was secretly impressed in his heart.

"After talking for so many days, I had a little compensation before, but only today's one is worthy of being named a marquis." Even Prime Minister Li Su couldn't help but admire, because he knew exactly how important this experience was to move across islands in the Pacific Ocean in the future.

Zhou Yu was praised by Li Su and finally breathed a sigh of relief, became more and more energetic, revealing all the details.

He carefully introduced how the South Island people could also judge what geological structure the island under the cloud was by looking at the color of light reflected on the lower surface of the cloud.

For example, there are woods and jungles, large islands with rich fresh water, and the lower surface of the clouds is generally green. If the clouds are dark, there are bare rocky volcanic islands below.

If the clouds are blue and yellow, there may be coral reef islands below, and it will be difficult to get supplies for wild plants and beast meat. At most, I hope to get some coconuts...

Li Su took notes in person, and recorded all these experiences that were crucial to the Han people's opening up the sea. Seeing that the Prime Minister had taken notes in person, people below Zhuge Liang should of course learn more in detail.

After explaining all these details, Zhou Yu finally mentioned how to see the migratory fish in the sea, and sea birds searching for land to help sea boats find islands in unknown seas.

Zhou Yu mentioned that the barbarians in Yizhou had a small number of chiefs from tribes who were good at navigating. They had raised a precious seabird, which flew very fast, had excellent eyesight, and had a strong instinct for observing island clues.

As long as you keep a bird like this, follow the seaboat and release the seabird if you expect to find land. If it cannot find an island within 500 miles, it will return to the boat and continue to eat and drink.

If this bird is instinctively aware of an island within 500 miles, it will fly away directly and towards the island. The ship will follow the direction of the bird's flight and you will definitely find the island within two days.

However, the price is also very serious, because as long as a new island is found, this kind of bird can only be used once. It will not be willing to be kept by humans for a long time and will not fly back directly. However, it will take a long time to train and domesticate before use.
Chapter completed!