Small aircraft used for charter-style transfers weigh every passenger and every bag before departure, because total loaded weight affects takeoff performance and balance on a short runway or a water surface. Scuba tanks, spare cylinders and weight belts typically travel by boat instead of by air. Exact baggage allowances for a Derawan route are confirmed only at quotation, aircraft by aircraft, not published in advance.
Why Do Small Aircraft Weigh Every Passenger and Bag?
Kalimarau Airport (IATA code BEJ), in Teluk Bayur district, Berau Regency, is the documented gateway for Derawan, Maratua, Kakaban and Sangalaki, reached on domestic flights connecting through Balikpapan or Tarakan. From Kalimarau, the road transfer to the jetty at Tanjung Batu runs about 2 to 2.5 hours, with speedboat legs of roughly 30 minutes on to Derawan, about 1 hour to Kakaban, and about 2 hours to Maratua or Sangalaki, figures current as of September 2026 and subject to change with sea conditions and departure schedules.
Any charter aircraft flying that corridor sits in the same small-aircraft weight category as the Wings Air service that already serves Maratua’s airstrip, the only airstrip in the archipelago, twice a week. On an aircraft this size, a few extra kilograms of baggage is not a rounding error. It changes how much fuel the aircraft can safely carry and how it performs on climb-out. That is the practical reason operators ask for a combined passenger-plus-baggage weight before confirming a seat, rather than printing one flat allowance that applies to every trip and every airframe. No kilogram figure is fixed in advance for a Derawan seaplane transfer — the limit is set per aircraft, per load, at the point a charter is actually quoted.
How Do You Declare Dive Gear and Camera Equipment Before Departure?
Divers heading to Kakaban’s landlocked jellyfish lake, Maratua’s Dolphin Point and turtle sites, or Sangalaki’s Manta Ray Point usually carry more than a beach bag. A typical dive kit includes a BCD, regulator, wetsuit, fins, a dive computer, and often an underwater camera housing with strobe arms. None of that disqualifies a seat, but it needs to be declared honestly at the quotation stage rather than discovered at check-in on the jetty.
Several dive resorts across the archipelago already coordinate transfers for guests booking a dive resort seaplane charter, and the declaration principle is the same regardless of which resort a guest is headed to: list every dive bag, its approximate weight, and anything fragile, so the operator arranging the charter can confirm what the aircraft can take and what needs to move by boat instead. Leaving gear undeclared until arrival is the most common reason a transfer gets reshuffled at the last minute.
A workable way to declare gear is to weigh each bag at home on a luggage scale, note the figure, and send that list together with passport details when requesting a quote. Camera housings, strobe arms and monitor screens are usually better hand-carried than checked, since they are the items most likely to be damaged by rough handling on a jetty or during a speedboat transfer between islands. Hand-carry space on a small aircraft is limited too, and it still counts toward the total weight the aircraft is cleared to carry.
What Typically Travels by Boat Instead of by Air?
Pressurised cylinders are the clearest case. A filled steel or aluminum scuba tank is heavy, awkward to secure inside a small cabin, and is generally treated as hazardous cargo on light aircraft, so it is standard practice across small-aircraft dive travel for tanks, spare cylinders, weight belts and lead weights to move by boat rather than by air. This is not a rule invented for this route specifically — it follows the same logic that already governs the rest of the Derawan transfer chain. Derawan, Kakaban and Sangalaki have no airport of their own and are always reached by boat, and even Maratua’s twice-weekly Wings Air flights land divers who then still need a boat for reef and lake access. A boat leg carrying tanks and heavy gear is simply part of how this archipelago already moves people and equipment.
The table below sets out how different categories of gear are typically handled, without assigning any specific kilogram figure, since that number is confirmed only when an aircraft is quoted.
| Gear category | Typical handling | Why |
|---|---|---|
| Filled or empty scuba tanks (steel or aluminum) | By boat, not on the aircraft | Pressurised cylinders are treated as hazardous cargo on most small aircraft |
| Spare cylinders, weight belts, lead weights | By boat | Add significant weight; some fall under hazmat handling rules |
| BCD, regulator, wetsuit, fins | Checked or hold baggage, declared at quotation | Ordinary travel weight, no hazard, but adds several kilograms |
| Underwater camera housing and strobes | Hand-carried where the aircraft allows, declared separately | Fragile, better kept out of cargo handling; still counts toward total weight |
| Dive computer, mask, snorkel, small accessories | Personal bag, standard baggage | Light, low bulk |
| Surface items (rash guard, sandals, dry bag, documents) | Standard baggage | No special handling needed |
How Do Derawan, Maratua and Kakaban Resorts Handle Tanks Locally?
Most licensed dive operations across the archipelago keep house tanks and fill equipment on site for guests, which is a large part of why personal cylinders are rarely flown in at all. Tank sizes, nitrox availability and rental BCD stock vary from resort to resort and are not standardised across the islands, so it is worth confirming directly with the specific property before deciding what to pack. A transfer quote such as the taxi-plus-boat rate charged by Scuba Junkie at Sangalaki, which is quoted per case on request, gives a sense of how locally these logistics are priced and arranged — resort by resort, not as one fleet-wide rate.
Asking the resort in advance what it stocks is the single most effective way to cut down on what needs to travel with you at all. A diver who confirms tank size and nitrox fills ahead of time may need to bring only a regulator, mask and computer, leaving the heavier hazmat-restricted items out of the packing list entirely.
What Should a Packing List Look Like for a Seaplane-to-Boat Combination Trip?
A combination transfer — flight into Kalimarau, then road, then boat, and in some itineraries a light aircraft leg — works best when gear is sorted before anyone reaches the airport, not at the jetty under time pressure.
- Weigh every bag before travel and write the figure down in kilograms, not an estimate.
- Split gear into two groups: items that fly with you (documents, cash, camera body, mask, light accessories) and items that typically go by boat (tanks, spare cylinders, weight belts).
- Photograph gear beforehand in case anything needs local replacement or repair.
- Request the aircraft’s confirmed baggage allowance in writing once a seat is quoted; do not assume a figure from a different route, a different operator or a different aircraft type.
- Contact the resort ahead of arrival about tank sizes, nitrox and rental BCD stock, so fewer kilograms need to travel in the first place.
Because no seaplane operator, designated water aerodrome or government water-landing regulation for the Berau-to-Derawan corridor is documented as of September 2026, every detail above — gear categories, handling, and any eventual kilogram limit — is confirmed case by case, subject to the operator’s approval, applicable authority permits and conditions on the day. Treat any baggage figure quoted verbally as provisional until it is confirmed in writing against the specific aircraft assigned to the trip.
Frequently Asked Questions
Can I bring a full scuba tank on a Derawan seaplane charter?
A filled tank is heavy and classed as hazardous cargo on most small aircraft, so it is normal for cylinders to travel by boat rather than by air. Dive resorts on Derawan, Maratua and Kakaban typically keep house tanks and fill stations on site, so ask the resort directly whether renting or filling locally removes the need to bring your own cylinder at all.
How is baggage weight calculated for a seaplane transfer to Derawan?
Weight is calculated per aircraft at the quotation stage, combining passenger body weight and every bag, since no fixed kilogram allowance is published for the Berau-to-Derawan route as of September 2026. Travellers should send an honest weight list, including dive gear and camera equipment, when requesting a charter quote so the operator can confirm what the specific aircraft can carry that day.
What happens to dive gear that doesn’t fit on the flight?
Gear that exceeds the confirmed allowance, or anything classed as hazardous like filled cylinders, is routed by boat instead, following the same jetty-to-resort legs already used for islands with no airstrip. Coordinating this in advance, through the resort or the party arranging the charter, keeps gear moving on a separate but timed leg rather than becoming a surprise at the departure point.