A ghost ship drifting without a crew stands for something from the past that keeps sailing on after its purpose has ended. Dream books read it as an old plan, bond or memory that still haunts your waters and asks to be laid to rest.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.