Cover Characteristic: Ships

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Cover Characteristic is a weekly meme hosted by Sugar & Snark. This week's theme was ships.

London, 1850 (Vampire Plagues, #1) by Sebastian Rook
An ancient evil. A doomed expedition. The heart of the British Empire is about of fall prey to an unspeakable curse...
When a merchant ship sails into port at twilight, jack recognizes it for what is: an opportunity. But Jack has never seen a ship quite like this one. A side from a flock of enormous black bats that flies from it hull, there's only one living soul on board - a young stowaway named Benedict Cole. Jack and the wealthy, educated Ben have little in common. But once Jack hears Ben's hair raising story of an ill fated expedition to Mexico and the strange sickness that's followed him back the two boys find themselves on the same side of a deadly struggle. With no one to turn to and nothing to rely on but their wits, they face a plague the likes of which London has never seen.
Demons of the Ocean (Vampirates, #1) by Justin Somper
Twins, Connor and Grace, never dreamed that there was any truth to the Vampirate shanty their father sang to them before he died, but that was before the two were shipwrecked and separated from each other. For Connor, who is taken aboard a pirate ship, there's the chance to learn to swordfight, but for Grace, aboard a mysterious ship of vampire pirates, the danger is great. What will it take for them to find each other?
Tonight on the Titanic (Magic Tree House, #1) by Mary Pope Osborne
Titanic trouble! Jack and Annie are in for an exciting, scary, and sad adventure when the Magic Tree House whisks them back to the decks of the Titanic. Is there anything they can do to help the ill-fated ship? Will they be able to save anyone? Will they be able to save themselves?
Titanic (Magic Tree House Research Guide, #7) by Will Osborne and Mary Pope Osborne
Questions about the sinking of the Titanic are answered in this companion to Tonight on the Titanic. This resource includes information on the people who sailed on the Titanic, life on board the ship, and artifacts today.

By Fire, By Moonlight (Unicorns of Balinor, #4) by Mary Stanton
Ari and her unicorn, Sunchaser, have been sent back through the Gap to Glacier River Farm- far from Balinor. Now the Gap is blocked. With time running out, Ari must embark on a perilous journey across the Sixth Sea.
I Survived: The Sinking of the Titanic, 1912 by Lauren Tarshis
Ten-year-old George Calder can't believe his luck -- he and his little sister, Phoebe, are on the famous Titanic, crossing the ocean with their Aunt Daisy. The ship is full of exciting places to explore, but when George ventures into the first class storage cabin, a terrible boom shakes the entire boat. Suddenly, water is everywhere, and George's life changes forever.