POC is an abbreviation for:
'Port Of Call For Orders'
If a discharge port is not designated on a Charter Party a chartered ship shall, after loading, proceed to some named port "for orders".
The list of ships above might say eg Pacific Unity--Manchester--POC would mean "Pacific Unity proceed to a designated later in Manchester area", the Master might even have an answer in a telegram "LEFO". In this case "LANDS END FOR ORDERS". I was up for an interview and the owner asked about abbreviations. Most I guessed but 'LEFO' stumped me. When he asked me what I would do I simply went back and said I would send a message back and ask. 35 years later I can still remember... LANDS END FOR ORDERS!!!!
Stephen