Since we've got confirmation that steam-powered boats do exist in Godsblood, Cid will absolutely be volunteering piloting the boat to get the hell out of Venera! In fact he'd probably be doing one of his undercover smuggling people out of danger thing by going in disguised as one of the normal trade ships. That is, he goes with people who are actually already on their way to Venera legitimately as traders, who are also Resistance supporters.

He'd be willing to have anyone interested in carving out an escape path for both him and the refugees tag along on the boat, but he would stress that the Aions need to be as inconspicuous as possible so there will need to be some actual attempts at physically unloading supplies off the ship onto the docks to look like real laborers.

After that, he's not going to be giving orders beyond specific times to meet at in order for them to start the task of getting the refugees safely out of the city. Given he's going to be inserting himself into the Estinien situation, he'll be in Venera until the end of the event, giving people plenty of time to blend in and do other tasks.