The Best Snorkeling Gear for the Clear Waters of the Derawan Islands
The Derawan archipelago sits off the coast of East Kalimantan in Indonesia, a chain of atolls and islets that includes Derawan, Maratua, Kakaban, and Sangalaki. The water here is famous for its glassy clarity, often reaching 20 to 30 metres of visibility, and the marine life rivals better-known reefs. Swimmers share the surface with green turtles, giant manta rays, and seasonal whale sharks, while Kakaban's jellyfish lake offers a snorkel among stingless golden jellies. For Australians planning a trip from Sydney, Melbourne, or Perth, this is one of the most rewarding marine experiences in Southeast Asia, and it deserves equipment that matches the conditions.
Most travellers flying in from Australia route through Jakarta or Denpasar before catching a domestic connection to Tarakan or Balikpapan, followed by a speedboat transfer to the islands. Darwin is the closest Australian capital, and direct flights to Indonesia are frequent, but most snorkelers still prefer to allocate at least ten days for the journey to make the boat ride worthwhile. The effort pays off once the engine cuts and you float above fields of staghorn coral. Having reliable kit ensures you spend those moments looking down rather than fiddling with a leaking mask.
Unlike the Great Barrier Reef, where many operators provide rental equipment, the Derawan chain has limited rental shops and most gear must be brought from home or purchased in Balikpapan. That makes preparation important, particularly because the islands' mix of shallow reefs, walls, and current-prone channels puts real demands on your equipment. Lightweight travel kit that still performs in tropical water is the goal, and Australian retailers such as Reef Knot, Scuba Culture, and Adventure Pro carry most of what you will need.
Before diving into specific equipment, it helps to remember that Indonesia rewards travellers who extend their journey beyond a single destination. Inland experiences like how to explore the tea plantations of the Puncak Pass in West Java offer a completely different side of the archipelago and pair well with a coastal itinerary. Planning your kit list with both reef and highland days in mind keeps your suitcase versatile and your options open.
Choosing the Right Mask for Tropical Clarity
A mask is the single most important piece of snorkel equipment, and a poor fit ruins every other item you bring. Look for a low-volume design with a tempered glass lens, which sits closer to your eyes and improves the field of view across the wide coral gardens. The silicone skirt should sit flat against your face without pinching, and a simple test is to press the mask to your face without using the strap and breathe in gently. If it holds, the seal is right for hours of floating above manta rays.
Australian travellers who wear prescription glasses should consider masks with built-in corrective lenses or removable lens inserts. Brands sold locally in Sydney and Brisbane dive shops offer left and right lens options from -1.5 to -8.0, which is essential for reading marine life details on the reef. Frameless masks fold flat for packing and weigh less, making them popular for carry-on luggage, while framed masks tend to be more durable for the boat journeys between islands. A mask strap cover in soft fabric also prevents hair tangles during long surface intervals.
Before each session, apply a defog solution or a thin smear of baby shampoo to the inside of the lens. Salt water alone will not prevent the mask from fogging once the temperature equalises, and the visibility in these waters is too good to waste on a cloudy lens. Rinse the mask in fresh water after every swim and store it in a protective box, because direct sunlight breaks down silicone over time and ruins the seal.
Snorkels and Fins for Current and Comfort
A simple J-shaped snorkel works for calm conditions, but the Derawan chain often has surface chop from boat traffic and light current around the reefs. A dry-top snorkel with a splash guard and float valve keeps water out when a wave breaks over your face, which happens frequently in the channels between Maratua and Kakaban. Flexible corrugated tubing near the mouthpiece also reduces jaw fatigue during the long surface drifts the islands are known for.
Fins determine how much energy you burn while covering long stretches of reef, and the wrong pair turns a relaxing swim into a workout. Open-heel fins adjustable with neoprene boots give the best power transfer and protect your feet from sharp coral and sea urchins during shore entries on Derawan and Maratua. Full-foot fins are lighter and pack smaller, but they assume a barefoot entry, which is not always possible at the islands' rocky access points.
A simple rule: if you can only bring one pair, choose open-heel adjustable models in a medium blade length. They work for nearly every snorkel site in the archipelago, pair with neoprene booties for cool dawn sessions, and can be rented in a pinch if your luggage is delayed. Bring spare straps, because bungee or rubber straps fail more often than the blades themselves, and replacements are hard to find once you are on the islands.
Sun Protection and Exposure Wear
| Option | Water Temperature Suitability | Sun Protection Level | Packability | Best For |
|---|---|---|---|---|
| Lycra rash guard | 27–30 °C | UPF 50+ | Excellent | Long surface swims, jellyfish lake |
| 2 mm shorty wetsuit | 25–28 °C | High (covers torso) | Good | Dawn sessions, light current |
| 3 mm full wetsuit | 23–26 °C | Highest | Bulky | Deep walls, multiple daily dives |
| Long-sleeve swim shirt | 27–30 °C | UPF 30–50 | Excellent | Surface intervals, travel days |
Derawan sits in the warm heart of the Coral Triangle, so a thick wetsuit is unnecessary for most swimmers. A long-sleeve rash guard or a 2 mm shorty keeps the sun off during hours of floating, and the slight insulation prevents chills after extended sessions in the deeper channels around Maratua. The tropical sun is intense, even through cloud cover, and Australian-made UPF 50+ rash guards from brands like Sun Soaked and Salt & Sea perform reliably on multi-day boat trips.
Reef-safe sunscreen is a must. Indonesian marine parks restrict sunscreens containing oxybenzone and octinoxate, and the same chemicals are now restricted in parts of Australia's Great Barrier Reef marine park. Mineral-based options with non-nano zinc oxide are widely available in Australian pharmacies and outdoor stores. Apply it 20 minutes before entering the water so it bonds to the skin, and reapply after every swim because saltwater strips even reef-safe formulas faster than you expect.
Pack a wide-brimmed hat for boat transfers and a neck gaiter for windy crossings, both of which fit easily into a daypack. Polarised sunglasses cut surface glare and make it easier to spot turtles and rays from the boat before you drop in. Australians travelling during the December to February window should also pack a light rain shell, because the wet season brings sudden tropical downpours that soak kit left on deck.
Accessories That Improve Every Session
A small dry bag keeps your phone, room key, and towel dry during boat rides between islands, and a mesh bag allows wet kit to drain in your cabin. Underwater cameras, whether a simple GoPro or a dedicated Olympus TG series, capture the greens and blues that make Derawan special, and a red filter corrects the colour cast in deeper water. Bring extra batteries and memory cards, because charging opportunities are limited on the smaller islands and a dead camera is a common disappointment.
Mask defog, spare straps, and a multi-tool belong in every snorkeler's daypack. A small first-aid kit with antiseptic and waterproof bandages is useful for the inevitable scrapes from coral or barnacles during shore entries. Travellers who use their own gear often forget a small carabiner to clip the mask and snorkel to the harness when surface swimming, which prevents loss during deep breaths.
If you have space, a pair of water shoes protects your feet during landings on coral rubble beaches and walks through shallow reef flats. Australian brands like Aqua Sphere and Speedo make lightweight options that pack flat. A reusable water bottle also helps, because plastic waste is a real concern on the outer islands and refill stations are rare.
Reef-Safe Behaviour and Marine Care
The marine life around Derawan is fragile, and good behaviour protects the experience for future travellers and locals alike. Never stand on coral, even dead-looking branches, because the polyps underneath are still alive and easily crushed. Keep fins horizontal in shallow areas to avoid stirring up sediment that smothers nearby colonies, and maintain a comfortable distance from green turtles, which are protected under Indonesian law.
Feeding fish alters their natural behaviour and damages the food web, so resist the urge to attract attention with bread or food scraps. Use surface floats and avoid dropping weights onto the reef when anchoring for surface intervals. The archipelago includes several marine protected areas, and rangers occasionally check boats for compliance with local regulations.
Australian travellers accustomed to the strict etiquette on the Great Barrier Reef will find the standards similar in spirit. Take only photos, leave only bubbles, and report any damaged moorings or injured wildlife to your dive operator. Small choices like using a mooring line instead of anchoring on the reef preserve the clarity that makes Derawan worth the long flight.
Packing for the Flight From Australia
Most airlines flying from Australia to Indonesia allow one checked bag up to 23 kilograms, which is plenty for a personal snorkel kit. Pack masks and snorkels in a hard case inside your luggage, and place fins along the sides of the bag where they are protected by clothing. A printed or digital copy of your gear list helps at the check-in counter, especially when travelling through Denpasar or Jakarta with a connection.
If your itinerary includes other Indonesian destinations, consider adding a side trip before or after Derawan. East Kalimantan borders Central Kalimantan, where the best time to visit the Tanjung Puting National Park for orangutans lines up perfectly with a return through Pangkalan Bun. Combining reef and rainforest gives a fuller picture of Indonesia's biodiversity.
Once home, rinse every piece of equipment in fresh water, dry it away from direct sunlight, and inspect masks and fins for cracks before storing. Booking a servicing appointment at your local dive shop in Sydney, Melbourne, or Perth before the next trip keeps silicone soft and buckles functional. With care, a good mask and fins will last a decade of Derawan visits and the inevitable comparison swims back on the Great Barrier Reef.
Before packing, spend an hour reading a guide to the coffee plantation tours in the Gayo Highlands of Aceh to round out the trip with a highland finale. The next concrete step is to open your gear bag today, lay out every piece, and write a checklist of what needs replacing before the booking deadline.