The original itinerary is here on the Orion II. I have written some overall notes on Orion II as I think intending travellers should be forewarned about problems, which at these prices should not exist.
Dec 3. Arrive at Hanoi and stay 3 days in Elite Hotel
Dec 6. Join the SS Orion II at Hanoi and sailed to Ha Long Bay,
Dec 8. From Ha Long we were meant to stop at Chan May, but bad weather forced us on to Da Nang, where we stayed for 2 days and saw all the intended sights at both Hue and Hoi An and My Son
Dec 11. Again bad weather prevented an overnight anchorage at Baie de Cu Mon, and instead we had 2 nights at Nha Trang, and again saw all the intended sights
Dec 13. Nha Trang and up the river to Saigon
Dec 14. Saigon to the Mekong port of Can Tho
Dec 15. Can Tho to the Vietmanese island of Phu Quoc
Dec 16. Phu Quoc to the Thai island of Koh Kut
Dec 17. Koh Kut to Bangkok
Dec 20. Bangkok to Ankgor Wat by plane. Overnight there then back to Bangkok.
Dec 22. Bangkok back to Koh Kut and on Ang Thong Marine Park
Dec 24. Ang Thong Marine Park to Koh Samui
Dec 25. Koh Samui to Tioman Island (the stop at Terengganu was missed because of bad weather)
Dec 27. Tioman Island to Singapore and back to Spain