If you have spent an evening comparing Ha Long Bay cruises, you will have noticed that roughly half of them describe themselves as six-star.
Here is the thing nobody selling you a cabin will say out loud: there is no independent six-star standard for cruise ships anywhere in the world. There is no body that inspects these vessels, no published criteria, and no certificate. “Five-star” and “six-star” are the words each operator has chosen to put on its own website. They tell you what the operator wants you to think, and nothing else.
That is not an accusation. It is how the category works, and every operator on the bay is doing the same thing. But if you are choosing a ship for a wedding or a company retreat, the star claim is the one piece of information on the page you should give the least weight to — and the rest of this post is about what to weigh instead.
Who claims what
Across the six ships we charter:
| Ship | Class claimed by the operator | In service |
|---|---|---|
| Aspira | 5-star | Since 2022 |
| Azura | 6-star | Since December 2025 |
| Athena Royal | 5-star | 2017 or 2019 |
| Athena Luxury | 5-star | Since July 2017 |
| Signature Halong | 5-star | Since 2013 |
| Athena Premium | 6-star | From 1 October 2026 |
Notice the pattern. The two ships claiming six stars are the two newest — one launched in December 2025, one entering service in October 2026. The correlation between a star claim and a launch date is much stronger than the correlation between a star claim and anything a guest experiences. Read “six-star” as “recently built and marketed accordingly”, and you will be right more often than not.
Note also that Athena Royal’s own materials give two different years for when it entered service. We publish both because we are not going to pick the flattering one, and a page that quietly resolves a contradiction in the operator’s favour is a page you cannot trust on anything else.
What actually separates these ships
Here is the same comparison rebuilt out of things that can be checked.
Size, which is the real decision. Twelve cabins for 24 adults on Signature Halong. Twenty-one for 42 on Athena Luxury. Twenty-two each on Aspira and Athena Royal, comfortable at 40–50 and 44. Thirty on Azura at 65–70. Forty-one on Athena Premium at 158. No star rating encodes this, and it changes your event more than anything else on the page.
Facilities, listed rather than implied. Three of the six carry a pool, a spa and a gym. Bathtubs are in every cabin on Azura and in every cabin on Signature Halong as a jacuzzi tub; Aspira lists one only for its Executive suites; Athena Luxury has standing showers. That last line is a genuine five-versus-six-star-sounding difference, and it does not track the star claims at all — the ship with a jacuzzi tub in every cabin is a 2013 five-star.
The things only one ship has. Athena Premium’s Japanese onsen is the first on this bay, and its 800m² sundeck rated for 400 at a cocktail is the largest event space of any ship here. Those are real differentiators, and notably the operator does not need the word “six-star” to explain them.
Where the ship goes. Athena Royal and Signature Halong sail Bai Tu Long, which is the quieter bay with a fraction of the traffic. Aspira reaches Lan Ha and Cat Ba Island on its 3D2N — the only itinerary on our list that does. The others run the classic Ha Long circuit: Sung Sot, Ti Top, Luon Cave. A ship’s route affects your guests’ day far more than its self-assigned class.
The review question, and why it is also misleading
The obvious counter is “forget the stars, look at the reviews”. Fair — but read them with the same scepticism.
Two traps. The first is scale: TripAdvisor scores out of 5.0 while Booking.com, Agoda and most others score out of 10. A ship showing 4.8 on TripAdvisor and 9.4 on Booking.com is not doing worse on TripAdvisor. Every rating on our ship pages carries its denominator for exactly this reason.
The second is age. Azura launched in December 2025, so it has had months to collect reviews where Aspira has had years. A smaller review count is not a quality signal; it is a calendar.
And a third, specific to this bay: some listings cover several vessels rather than one. We treat those as unusable rather than quietly attributing them to whichever ship flatters best. If a comparison site is showing you a score that seems too good for a boat that launched last quarter, check what the listing is actually attached to.
What to ask instead of “how many stars”
Five questions, none of which any operator can answer with an adjective.
- How many cabins, and how many adults is the ship comfortable with?
- What is the indoor seat count, and does my whole group fit in it at once?
- Is a projector fitted? Is there a microphone?
- Is the Hanoi transfer in the fare, a charged shuttle, or mine to arrange?
- What dietary menus exist in print, and which would be improvised?
Those five will separate six ships faster than any amount of brochure reading, and the answers are either numbers or they are not answers. For a wedding, add a sixth: where exactly does the ceremony go if it rains, and how many seats are in that room. For a corporate retreat, add: where is the connectivity, honestly.
The honest summary
The star class tells you when the ship was built and how confidently it markets. It does not tell you whether it suits your guest list, your format, your budget or your weather. The six-ship comparison is built entirely from the second list rather than the first, which is why it occasionally makes an older five-star look better than a newer six — and why we would rather publish it that way than the other way round.