Pilot stations use tugboats to guide ships, that is, if large ships or ocean-going ships enter the port, they can't drive in directly by themselves. The pilot station must send a tugboat to guide it to the designated wharf, and of course, it must also charge a certain service fee from the shipping company; External management company is the abbreviation of ocean shipping tally company. This unit seems to provide tally service for ocean shipping, but now it is all containers, that is, after the boxes arrive at the factory, they will send people to look after large quantities of goods, and of course they will charge the shipping company a certain fee. But at present, the significance of individuals to the existence of the company is a bit unclear, as if it is unnecessary to get something for nothing;
Personally, I don't think the latter needs anything from the former. Both of them provide services to shipping companies, charging service fees, and there is no intersection and correlation.