Total (direct+indirect) employment of the FVG port system is estimated via a methodology applied to the bi-regional I-O model. The figure depends on which assumptions are made. Under the extreme assumption of total port closure and substitution of the demand currently satisfied in the FVG port system by foreign imports the total loss for the entire national economic system is equal to 11 443 people. This is a specific feature of this research that is discussed in detail below.