Why does Freedom show zero decompression stop after no-deco time?
No. Freedom may show zero stop depth/time after no-deco time ends if the planned ascent itself provides enough desaturation before a stop is needed.
No. The “No deco time” is terminated in the moment when decompression ceiling is immersed under the surface. Freedom supposes ascent in set ascent rate and calculates with this rate in its decompression plan. If the ascent time is sufficient for desaturation there is no decompression stop. Decompression stop is displayed in the moment when direct ascent isn’t sufficient for desaturation.