Room 3B just learned something about Ida that no one ever knew. She had an acestor who sailed on the Titanic--and lived to tell about it! Harry and his friends wish they could go to sea, too. So Miss Mackle decides to take them on a real riverboat trip. She's so excited she gets everyone a sailor aht and writes their names on them. It seems like the perfect field trip--until Song Lee sees Sidney's hat floating on the water. Is Sid the Squid lot at sea?