The cargo ship is read as everything you carry between one place and another — duties, goods, expectations. Dream books link it to work and exchange, and to asking whether the load on board is still yours to deliver.
When this appeared in your dream, what were you feeling?
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.