Without active sonar? Not at a reasonable distance. Active Sonar can detect the water void/material difference with reasonable accuracy. U.S. sub streamlining

Without active sonar? Not at a reasonable distance. Active Sonar can detect the water void/material difference with reasonable accuracy. U.S. sub streamlining and cavitation avoidance makes them nearly undetectable under running, much less full stop, and that's with a large prop rotating.