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The Kamal was a navigational tool used by the Arabs in the Indian Ocean. It is made up of a small, rectangular card with a knotted cord passed through it. Its purpose was to determine latitude at the sea by looking at the distance between the horizon and the stars at the same time every night.
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The monsoon wind pattern was well established in the first millennium BCE. With this discovery people were able to sail across the Arabian Sea. It was powered by seasonal warming and cooling of large air masses.
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Some good traded from the Mediterranean were wine, gold, olive oil, and ceramics.
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Some goods traded from East Africa were iron, slaves, ivory, gold, and leopard skin.
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Some goods traded from Arabia were perfumes, Myrrh, and Frankincense.
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Some good traded from Asia were nutmeg, cloves, tin, and sandalwood
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Some goods traded from India were grains, spices, and stones.
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The Chinese introduced the magnetic compass. This compass was created to help navigate through the sea better. Later than the compass was used for trade which increased the advancement in the sea travel.
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Some goods traded among the Romans and Chinese were robes made of silk.
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Hinduism, Buddhism, and Jainism spread over to the Bay of Bengal Southeast Asia. During the classical period Judaism and Christianity quickly aroused. This resulted in migrations to Ethiopia, Arabia, and India
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Throughout trade some diseases spread such as the bubonic plague. This disease is cause by bacterium Yersinia pestis. This is a deadly disease.
