The term 'Port Workhorses' refers to the powerful vessels known as TUGS, which are used in ports and harbors to move large ships and barges. TUGS are typically four-letter vessels that are designed to provide a great deal of thrust and maneuverability in order to safely guide larger vessels into and out of port. They are an essential part of the maritime industry, providing a vital service to ensure the safe and efficient movement of goods and people.