Complex sentence: The Portuguese Diogo de Melo arrived at the spot by chance in 1523, when heading towards Ormuz but was caught in a violent storm and had his boat blown towards the coast of Daman.
Split into simpler sentences: The Portuguese Diogo de Melo arrived at the spot by chance in 1523, when heading towards Ormuz. He was caught in a violent storm and had his boat blown towards the coast of Daman.