12266, Maptech NOAA Recreational Waterproof Chart-Chesapeake Bay Choptank River and Herring Bay; Cambridge. Maptech NOAA recreation charts are ideal for use aboard recreational (non-commercial) vessels. Printed on durable waterproof plastic. Accurate and up to date — usually printed after you order is placed. Maptech NOAA charts use traditional NOAA chart colors which also makes them the perfect choice for framing and decorative purposes.