Sailing Nahoa · βίντεο

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Ben and Ashley, owners of the custom-built catamaran Nahoa M, explain the structural and systems decisions behind their new build by tracing specific offshore failures they witnessed or experienced firsthand.1:15 The central argument: most production catamarans are vulnerable at two points — the sail drive and the rudder — because both penetrate the hull and, when damaged on a reef, flood the engine compartment directly.8:52 A Privilege catamaran grounding on Beverage Reef and a separate incident involving Tandamileka in Huahini both illustrate how inaccurate charts combined with sail-drive flooding nearly sank boats that survived the initial impact.8:27 The Nahoa M addresses this by replacing sail drives with shaft drives and V-drive transmissions, eliminating those hull penetrations entirely.10:52 The righting-moment curve for catamarans is explained in detail: a cat resists heeling five times harder than a comparable monohull at normal sailing angles, but capsizes irreversibly past roughly 14 degrees — a cliff the Nahoa M's low center of gravity and wide beam push further away than a flybridge charter cat.22:10 The build adds four watertight bulkheads creating six compartments, six independent 4,000-gallon-per-hour bilge pumps totaling 24,000 GPH capacity, six separate bilge alarms, fire-resistant closed-cell foam insulation, automatic engine-room fire suppression, and lifelines raised to nearly one meter.18:20 A Banda Sea incident where a burst freshwater-tank hose triggered the bilge alarm mid-passage reinforced the case for compartment-specific alarms.14:49 Redundancy in pumping, watertight subdivision, and eliminating sail drives are the practical conclusions drawn from every failure described.

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