Dive Site: Dusborough

About Dusborough

Dusborough is a notable dive site within the Banda Sea's Forgotten Islands, recognized as one of the remote, isolated atolls. This site offers an incredible combination of beautiful sloping reefs and dramatic deep walls, teeming with diverse reef life. Its location as a volcanic structure rising from oceanic depths means it is exposed to nutrient-rich currents, which in turn attract a wide array of pelagic species. Divers here can expect excellent visibility, often exceeding 30-40 meters, allowing clear views of the vibrant hard coral formations and abundant reef fish that inhabit the shallower sections. The unique bathymetry of Dusborough creates strong upwellings that are particularly appealing to larger marine life. The real allure of Dusborough lies in the consistent possibility of encountering schooling hammerhead sharks, especially during the prime pelagic season. Beyond sharks, the site promises encounters with dense schools of fusiliers and unicornfish, frequently observed being hunted by larger predators, highlighting the dynamic ecosystem. Access to Dusborough is exclusively via liveaboard, typically as part of extended itineraries through the Banda Sea. Given its open ocean exposure and potential for strong currents, it is best suited for experienced divers who are comfortable in dynamic conditions, offering some of Indonesia's most exhilarating dives.

Dive site facts: Dusborough

Depth

5–40 m

Typical dive

15–30 m, 50–60 min

Current

Can be strong

Visibility

30–50 m

Water temperature

25–29°C

Entry

Liveaboard tender / negative entry

Level

Advanced Open Water, 50+ logged dives, current experience

Dive type

Pelagic, wall, reef

Night dive

Not common / seasonal

Region / port

Banda Sea, Forgotten Islands

Coordinates

6.6433° S, 128.0939° E

Conditions & Currents

As an exposed seamount in the open ocean, Dusborough experiences currents that can be unpredictable and strong. Its position, rising from deep waters, means nutrient-rich upwellings are common, which draw in large pelagic species. Divers must be prepared for varying current strengths and possess proficiency in drift diving techniques to safely navigate the site. Visibility is typically excellent, often exceeding 30-40 meters, due to the remote location and lack of terrestrial runoff. Water temperatures generally range from 27-29°C, but can drop to 25°C within thermoclines where hammerheads are frequently observed, necessitating appropriate thermal protection. A solid understanding of buoyancy control and the ability to perform safety stops in blue water using a surface marker buoy are crucial for safe diving at this dynamic site.

Marine life & sighting chances

Scalloped hammerhead shark

September-November · common

Grey reef shark

occasional

Silvertip shark

occasional

Giant trevally

common

Tuna

common

Barracuda

common

Dogtooth tuna

occasional

Napoleon wrasse

occasional

Mobula ray

occasional

Sperm whale

rare

Turtle

common

Grouper

common

Sea snake

common

Dive profile & how the dive runs

Diving at Dusborough typically begins with a tender drop near the atoll's edge, often requiring a negative entry due to potential currents. The dive plan usually involves descending along deep walls or sloping reefs, maintaining awareness of the current direction to facilitate a drift. Divers explore depths between 15 and 30 meters, constantly scanning the blue for pelagic encounters, especially hammerheads that frequent deeper sections and thermoclines. The route often involves circumnavigating a portion of the atoll, allowing observation of both reef life and passing pelagics. Turn points are determined by air consumption and bottom time, with ascents initiated to ensure adequate decompression. Safety stops are commonly conducted mid-water in the open ocean environment, with the deployment of a surface marker buoy being essential.

Underwater photography

Dusborough offers exceptional opportunities for wide-angle photography, particularly during hammerhead season when schooling sharks can be captured against the clear blue water. Divers should prepare with wide-angle lenses to encompass the expansive reef scenes and large pelagic encounters. Due to the potential for strong currents and open-ocean conditions, excellent buoyancy control is crucial to maintain position and avoid damaging corals or disturbing marine life. Strobes are recommended to bring out the vibrant colors of the healthy corals and schooling fish, while maintaining a respectful distance from subjects like sharks is paramount for both diver safety and ethical wildlife interaction.

Combine with nearby dive sites

• Nil Desperandum Atoll

  Another isolated atoll renowned for pelagic action including hammerheads.

• Manuk Ridge

  Known for abundant sea snakes and potential hammerhead sightings.

• Jackpot

  A site near Serua famous for hammerhead sharks.

• Terbang Islands

  Features spectacular shallow coral gardens and steep drop-off walls.

• Nuslear

  Known for stunning shallow coral gardens and dramatic walls.

Getting there & logistics

Access to Dusborough is exclusively via liveaboard, as it is part of the remote Forgotten Islands in the Banda Sea. Most liveaboard itineraries typically span 10 to 14 days, often starting or ending in Ambon or Maumere, with some ending in Kupang. Guests usually fly into these regional airports, where transfers to the vessel are arranged. The dive site is combined with others like Nil Desperandum and Manuk Island as part of a broader Banda Sea exploration, targeting the transient windows between the main Raja Ampat and Komodo seasons. Mandatory local diving fees, fuel surcharges, and port fees are typically paid on board.

Safety & environment

Given Dusborough's open ocean exposure and potential for strong, unpredictable currents, divers must be advanced, have considerable current diving experience, and possess excellent buoyancy control. A surface marker buoy (SMB) is mandatory for every diver for safety stops in blue water and for signaling the boat. The nearest recompression chamber is likely in Ambon, requiring significant travel time, so robust dive insurance with adequate medical evacuation coverage is essential. Always dive with a well-maintained dive computer and carry sufficient gas reserves. Adherence to liveaboard safety briefings and dive guide instructions is paramount to mitigate risks in this remote and dynamic environment.

Who it suits — and who it doesn't

FAQ

Dusborough FAQ

Liveaboards diving Dusborough

These liveaboards may visit Dusborough on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Wellenreng

Indonesia

9 guests25 m

$427/day

Mari

Indonesia

14 guests32.2 m

$328/day

Pindito

Indonesia

16 guests37.79 m

$533/day

Mermaid II

Komodo, Indonesia

18 guests

$355/day

Gaia Love

Alor

20 guests

$554/day

Emperor Raja Laut

Raja Ampat, Indonesia

12 guests31 m

$413/day

Malaillo

Indonesia

14 guests45.57 m

$348/day

Damai II

Komodo, Indonesia

14 guests

$459/day

DUNE Aurora

Indonesia

18 guests

$344/day

Calico Jack

Indonesia

10 guests30 m

$398/day

Coralia

Indonesia

16 guests48 m

$577/day

Ilike

Indonesia

16 guests40 m

$298/day