[Parmenio]

The link you posted said that the boat passed down the Mississippi. Does anyone know what route it took to get from Manitowoc to the river?

[Iris7]

Across Lake Superior and down the St. Lawrence. The subs drew too much water to get through the locks so Manitowoc built a special hybrid ship and floating drydock to carry the boats (a submarine is a boat) to deep water.

If you get to Manitowoc visit Cobia. Two patrols against the Japanese, as I recall, and even the original vacuum tubes are still plugged into her radars. The lady is treated with respect in Manitowoc.