The hull design of the HC50 incorporates the lines of both Hunter's Child and Route 66. B&R Designs invested considerable development time on this shape in the test tank (at the Royal Institute of Technology in Stockholm, Sweden), shaping the hull lines which became the basis of Hunter's Child's exceptional speed and seaworthiness. The aim was to produce a hull shape that would plane easily and which did not alter below the waterline with variations in heel angle. In this way the fore and aft balance of the hull remains the same whether upright or heeled. The result is a boat that is easy to steer and has great directional stability. The forces on the helm are reduced and the tendency to broach in heavy surfing conditions is nearly eliminated. These fair hull lines are actually a series of semicircular underwater sections of increasing radius as the design moves aft. This shape achieves a narrow waterline (easily driven with low wetted surface) with a wide flared deck and deflector ridge. The flared deck joint helps divert spray away from the boat, keeping the deck and cockpit dryer and giving a lifting force that helps prevent the bow from diving at speed. Tank and full scale testing have shown that instead of sinking into the trough between progressively larger bow and stern waves as speed increases (this always occurs with traditional displacement hull types), this shape lifts toward the surface and the bow wave moves aft. The acceleration from displacement sailing speeds to planing speeds is smooth with a minimal hump of resistance to overcome as this transition occurs (as is typically experienced in planing powerboat hull types). In practical terms, this translates into a simple equation: on optimum points of sail, the stronger the wind blows the faster the boat moves. To produce a strong and light offshore sailboat, Hunter has detailed the construction to include high tech materials and production methods.