Which port drags require white-skinned third pair?

Guangdong Zhanjiang Port Group Co., Ltd. According to the boss direct recruitment query, as of July 20, 2023, Guangdong Zhanjiang Port Group Co., Ltd., due to business development needs, has specially recruited 10 port tugboat crew members. Among them, the white-skinned driver and third mate must have GMDSS certificate 5 There are 5 white-skinned engineers in charge, and the above positions are to train crew members at Zhanjiang Port. Both white-skin third mates are third mate deck certificates. The main difference lies in the country of issuance and scope of application.