"Century to Starboard" by Liz Williams
Through the diary entries of ultra-rich Vittoria Pellini, Liz Williams captains a condo-cruise of the Pacific in "Century to Starboard". When Vittoria's husband makes an offhand comparison to the Titanic, the expectation of doom is set. The ship weathers a typhoon with remarkable ease, but the world is not so fortunate. They make port in Honolulu where the city's buildings are destroyed and Vittoria is left to speculate the cause. The ship sails on through painted skies and stormy seas, searching for a homeport, but finding only ruin.
The Ship's crew keeps too many secrets from the passengers, turning my curiosity to frustration. As the regularity and cohesion of the journal entries deteriorate, so does the chance that the resolution will be comforting. It is the transformation in Vittoria–from pampered observer to active survivalist–that captures the essence of her character and transcends the gloomy ending.