experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots experimental high-speed Navy ships can’t far exceed 50 knots