King Neptune is a 46-meter (150-feet) steel and aluminum-hulled luxury liveaboard yacht, launched in 2026 as the third vessel of the Neptune Liveaboards fleet. Designed for exceptional diving expeditions across Indonesia, she accommodates up to 20 guests in 10 en-suite sea view cabins: four on the main deck and four on the upper deck with a king bed or twin beds, plus two Sea View Single cabins that convert to bunk beds for two. Every cabin has an en-suite bathroom and individually controlled air conditioning.
King Neptune is crewed by a professional team of 20 and is equipped for extended voyages, with a range of 3,000 nautical miles. Powered by two 600HP Yanmar engines and cruising at a service speed of 10 knots, the vessel ensures smooth and stable journeys. Three Cummins generators provide reliable onboard power, while two Coltri 315 compressors and a dedicated Coltri Nitrox system support advanced dive operations, with Nitrox refills included in every trip.
Supporting the diving program are two 8-meter RHIB tenders powered by 150HP engines, a dedicated dive center and a camera station. The vessel also features a watermaker producing 10 tons of fresh water per day, supported by a 45,000-litre freshwater tank and a 40,000-litre diesel tank to sustain long-range expeditions.
Between dives, guests share an air-conditioned lounge and bar, a restaurant, shaded outdoor lounges and a sun deck with a jacuzzi and sun loungers. King Neptune combines thoughtful comfort, technical reliability and spacious design to deliver unforgettable diving adventures across the Indonesian archipelago.
The Sea View Cabin, located on the main deck, features an air conditioner and an en-suite bathroom. It can be configured with either a king bed or two single beds, providing flexible accommodation options.
4 Cabins · 2 guests
The Sea View Cabin, situated on the upper deck, offers air conditioning and a private en-suite bathroom. It can be arranged with either a king-size bed or two single beds, ensuring flexibility for your stay.
4 Cabins · 2 guests
Ideal for solo travellers · bunk option for two
A private sea view cabin on the upper deck, made for solo travellers who want their own space: a comfortable single bed, en-suite bathroom and individually controlled air conditioning. Travelling with a buddy? The cabin converts to two bunk beds.
2 Cabins · 1 - 2 guests
* Extra fees are shown per person.
If there are any dietary restrictions you can inform us during the booking process. We will accommodate religious beliefs or food allergies. All meals consist of a mixed choice of vegetables, pasta/rice and meat dishes.

| Year Built | 2025 |
| Last Renovated | 2025 |
| Length | 46 m / 150 feet |
| Beam | 9.30 m / 30 feet |
| Cruising Speed | 10 knots |
| Engine | 2 x 600HP Yanmar |
| Max Guests | 20 |
| Nr. Cabins | 10 |
| Nr. Bathrooms | 10 |
| Tenders | 2 |
| Water Capacity | 45,000L |
| Fuel Capacity | 40,000L |
| Freshwater Maker | 10 tons / day |
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