EORI is an Economic Operator Registration and Identification. This is required if you are a person or trader carrying out custom activities in the EU. Newminster House, Bristol BS1 1LT Open 24/7 (+44) 01823 335666
Vessel is a catch-all term, like 'watercraft', which describes any floating object used for the carriage of people or goods. Generally smaller and less complex vessels are 'boats', whilst larger and more complex vessels are 'ships'. As a general rule, you can put a boat on a ship, but you can't put a ship on a boat.
Port is the nautical term (used on boats and ships) that refers to the left side of a ship, as perceived by a person on board the ship and facing towards the bow (the front of the vessel).