Self righting technology in Naval architecture involves the use of watertight 'voids' or compartments near the keel ( cold,bilge water accumulating compartments 6'2" californians barely fit in to repaint under the guidance of bigoted oregonian senior petty officers.)and the use of lighter, ie aluminium superstructures.
Older designs, like USCG 36535, my first 'command' employed a heavy, solid bronze keel paired with a double ender design and LOW CIG that took real genius to capsize in the first place.
They retired that boat on me, sent it on display with credit to another station and gave me a lousy 44' MLB- which I did in fact flip when the port engine head cracked. It seems this senior, oregonian petty officer forgot to connect both hot starts.then I was senior to him, and HE painted voids, another self righting feature of staying level headed in adversity or storms.