Full order book, proven export record: why serious buyers choose Coastal Boats for the Mumby 48

Coastal Boats (Cambodia) Co Ltd has dedicated its 700 m² Kampot facility to production of the Mumby Cyber 48 aluminium performance catamaran — with a full order book and a delivery record spanning seven countries across four continents. Here is what buyers need to know before the next build slot closes.

The Mumby Cyber 48 is a 14-metre aluminium performance sailing catamaran — a blue-water cruising and offshore design built for buyers who want the weight savings and durability of alloy construction without the cost and lead times of a European yard. Coastal Boats (Cambodia) Co Ltd has restructured its facility around production of this vessel, with a full order book now in place and multiple hulls progressing through the build sequence simultaneously.

For buyers currently researching aluminium performance catamaran builders, the Coastal order book status is the most important piece of commercial information in this article: slots are finite, and the yard’s factory setup is optimised for this specific hull. Enquiries for future build positions should be made early.

The Mumby Cyber 48 — what the design delivers

The Mumby 48 is a well-established design in the offshore performance catamaran segment. At 14 metres, it sits in the sweet spot for serious blue-water cruising: large enough for comfortable liveaboard use and ocean passages, compact enough to be handled by a couple, and in aluminium, significantly lighter than an equivalent GRP production cat of the same length.

The performance advantages of an aluminium hull at this size are measurable. Weight savings over GRP run to 30–40% on a comparable structure, which translates directly into sail-carrying capacity, upwind performance, and the ability to reach hull speed in lighter air. For offshore passages — the Southern Ocean, the North Atlantic, the Indian Ocean — an alloy hull also offers the impact resistance that fibreglass cannot match: a collision with floating debris or a submerged object that would hole a GRP hull is survivable in welded aluminium.

How Coastal builds the Mumby 48

Coastal sources 5083-grade marine aluminium plate from Singapore, certified to Bureau Veritas (BV) or Det Norske Veritas (DNV) class standards. Bulkheads and primary structural frames are CNC-cut in Singapore before shipment to the Kampot facility, ensuring the dimensional accuracy that production building demands. The yard’s 700 m² floor space supports up to three hulls in simultaneous construction — a capacity configuration specifically matched to the Mumby 48 production programme.

Complex curved sections — aft beams, topsides, bow sections — are handled using traditional lofting alongside the CNC-precut components. Aft beams are lofted directly from the plans and manually cut; topside parts are transferred to plywood templates to minimise plate waste. This hybrid approach delivers the speed of digital fabrication on standard sections while preserving the fairing precision that defines a quality finish on the curves that give the Mumby 48 its character.

Coded welders and skilled fabricators with extensive aluminium boatbuilding experience complete the structural work. The result is a hull that meets the material and construction standards expected by class surveyors in Australia, Europe, and beyond — as evidenced by the yard’s completed export deliveries.

Production facility at a glance

Why choose Coastal over other Mumby 48 builders?

The Mumby 48 design can in principle be built by any competent aluminium yard. What distinguishes Coastal is the combination of a production-configured facility, a full-time skilled workforce experienced specifically on this hull, and a verified international delivery record that demonstrates the yard’s ability to build to the standard required for export, class survey, and commercial operation.

The yard has delivered vessels to seven countries — Indonesia, Australia, the United States, Sweden, Singapore, Thailand, and Cambodia — across three construction materials and vessel types ranging from 18-foot classic runabouts to 49-ton ocean-going trawler yachts. That breadth of export experience is directly relevant to a Mumby 48 buyer: it means the yard understands what classification surveyors, customs authorities, and flag state administrations in different jurisdictions require, and builds accordingly from the outset.

The broader delivery record — what it means for Mumby 48 buyers

Coastal’s export history across seven countries is a reference base that speaks directly to the question every international buyer asks: will the yard actually deliver, to standard, on time, and compliant with my jurisdiction’s requirements?

The Indonesian delivery deserves particular mention. Indonesia is the world’s largest archipelago nation — over 17,000 islands served by one of the most active inter-island ferry markets on earth. An aluminium passenger catamaran operating commercially in that environment faces frequent cycle loads, varied sea states, and the need for reliable performance without nearby specialist service infrastructure. That the vessel was purchased by an Indonesian commercial operator and placed into service is a meaningful endorsement of build quality and seakeeping ability.

The Chris Craft replica programme speaks to finish quality at the other end of the spectrum. Built using cold-moulding — three layers of 4 mm marine plywood over a Mai Takhian timber frame, with vacuum-bagged mahogany veneer on the hull sides and solid mahogany/ash decks, finished in clear multi-coat polyurethane — and exhibited at the Los Angeles Boat Show, these vessels were built to the expectations of discerning buyers in one of the world’s most demanding leisure boat markets.

Who should enquire now?

Performance sailing buyers who have decided on the Mumby 48 design and are comparing builder options — the Coastal order book position means acting promptly is the most important factor at this stage.

Buyers priced out of European or Australian yards who require the same BV/DNV-certified material quality and professional build standard at a substantially lower total cost.

Liveaboard and blue-water cruising buyers seeking an aluminium performance cat in the 40–50-foot range with offshore capability, structural integrity for high-latitude sailing, and the repairability that alloy construction uniquely provides in remote anchorages.

Charter and expedition operators looking for a custom performance sailing cat specified to their exact systems, layout, and finish requirements, built by a yard with a verified record of delivering to international markets.

Enquire about the next available build slot