Boulogne had fallen and Calais was about to, leaving Dunkirk, Ostend and Zeebrugge as the only viable ports which could be used for evacuation.

The fourth generation also was the first time compact discs were considered a viable port for video game retail sales with the CD-i.

Wouldn't viable ports, secure water sources, healthy agribusiness and manufacturing plants be more productive in the fight against Islamic extremists than military action?

Gort ordered that the BEF should withdraw to Dunkirk, the only viable port remaining, to facilitate evacuation (pic.

At the time, the dredging of that passage had been necessary for St. George's to remain a viable port as steam replaced sail.

Logistical problems were presented by the fact that the only viable port in the area, Cherbourg, was heavily defended.

"East Coast ports tend to be shallower than those out West, and it's clear that the viable ports of the future are going to have 50 feet of water."

The loss of Savannah as a viable Confederate port crippled the Southern war effort.

We were no longer a viable modern port.

Without Yvrig, we're the only viable port on the southern part of the continent.