Missing seaplane bases Martha Lake S13 and American Lake W37

This add-on restores the S13 Martha Lake and W37 American Lake seaplane bases, previously featured in Flight Unlimited III, to Microsoft Flight Simulator. Both bases are recreated with accurate designators, start and endpoints, correct runway orientation, and lengths based on available research. The scenery is kept simple for authenticity and performance. Ideal for users seeking classic Pacific Northwest seaplane locations.