That needs to be changed to. . . damn - every time we think the rules are locked down we discover something that did not get changed. . .Naval units may move strategically or tactically on this phase - they just need to end movement back in a friendly port.
So, transports that ended their movement in Tripoli could move back to Sicily, grab cargo, and move back to Tripoli, drop off and end their movement if they move within the 4 movement points allowed in tactical movement.
fixing the rulebook to address this. .