1. London, with Thames Ferries DLC's, maybe even HMS Belfast
2. Hawaii, with more speedboats and inter-island fast ferries
3. Holyhead to Dublin, with Irish Ferries ships & Stena Line ships
4. Atlantic with USA and Ireland
5. Gulf of Mexico
6. Panama and/or Suez Canal
7. A new fast ferry similar to Red Jet 4, but faster, longer and generally bigger. It could be called Deep Endeavour.
8. A bigger, more powerful research ship than Esperanza. It could be called Deep Endeavour or Ocean Endeavour
9. Navy DLC-with a Destroyer, Aircraft Carrier, Hovercraft etc
10. A Global Map, where you can go anywhere!
11. The Nile
12. The Great Lakes
13. Belfast
14. Some people would like to see Titanic reintroduced
I hope you like these ideas, and maybe even use them!
Aslas
PS: These ideas weren't all mine. I talked to some others about it.