I hope that helps somewhat.
Only very nominally.
Their business is the "commercial" operations of their business; the industry short hand for this is simply port operations but again, that only involves their business: longshoremen, cranes, forklifts, etc.
What does this mean? Are they responsible for an occasional "oil and lube" on them? Do they source them and oversee the maintenance contracts on them? Do they need to make sure that the appropriate people show up to run them every day/week? What do you mean by "commercial?" That can mean anything. Is there a private or not-for-profit aspect to port operations? I can't imagine. So that means that it's all commercial.