The Stalwart-class ocean surveillance ships had maximum speeds of . They were built to be fitted with the Surveillance Towed Array Sensor System (SURTASS) system. The ship had an endurance of thirty days.
The Stalwart-class ocean patrol ships reached top speeds of . These vessels were constructed to be outfitted with the Surveillance Towed Array Sensor System (SURTASS) system. The ship's operational time spanned thirty days.