When evaluating hovercraft, prioritize the hull material, typically fiberglass (GRP) or marine-grade aluminum, for a balance of weight and durability. The skirt system is critical; look for segmented finger skirts made of high-tear resistance nylon with neoprene or polyurethane coating, as they allow for easier maintenance and better stability. Ensure the engine is a reputable brand (e.g., Rotax, Briggs & Stratton) with a closed-loop cooling system if operating in saltwater to prevent corrosion. Finally, verify the payload capacity and static hover height to ensure it meets your specific operational requirements.