Answer:
Because the ships were not 'seaworthy'
Step-by-step explanation:
The Polos refers to a group of sailors led by Marco Polo that was tasked to find trading routes within Asian region.
When their ships were about to go from Hormuz, the crew realized that the ship was not 'seaworthy'. A lot of equipments and parts of the ships were broken during their journey and they didn't have enough time to repair it. Because of this, the Polos decided to continue by joining a caravan of travelling merchants.