Complex sentence: From November 2008, the ship will be operating in the Caribbean from Bridgetown, Barbados and from April 2009, the ship will be sailing in the Eastern Mediterranean from Heraklion, Crete.
Split into simpler sentences: From November 2008, the ship will be operating in the Caribbean from Bridgetown, Barbados. From April 2009, the ship will be based in Heraklion, Crete.