You can take the exam. Sailors on duty working on non-carriers can apply for three pairs of cargo carriers, but they need to meet the corresponding qualifications, and the total number of duty of sailors on duty or senior sailors is not less than 18 months. Three pairs of cargo transport ships that have been working on non-transport ships can be promoted to two pairs of transport ships, but they must also meet the requirements of corresponding qualifications and have served as three pairs of ships that have reached the qualification certificate level for 12 months.