The Dream Vessel is the second book in the series of two by Jeff Bredenberg (1953-2010). It's different from most post-apocalyptic stories I've read -sailing ships? pirates?- and that alone makes it worth reading.
from the back of the book:
ONCE UPON A TIME THERE WAS A REVOLUTION
A glorious uprisingsmashed the power of the Monitor -the bloodthirsty dictator who enslaved the inhabitants of a continent already ravaged by nuclear devastation. Now rebel leader Rosenthal Webb must spread the message of freedom to what remains of the world. To do so, he needs a great sailing ship. And that means consorting with slavers, pirates and cutthroats -trusting them to serve his cause and transport his emissaries safely across a vast ocean of breathtaking possibility and horrific peril.
And somewhere beyond the horizon, Pec-Pec is waiting -Rasta God, thief and mystical trickster- to bend the noble mission to his incomprehensible will... and move the world into his own vision of an impossible future.