cracks at the corners of bulker's hatches, drilled the ends, ground a vee along the crack and welded it. deck cracks at the base doublers of deck cranes, same thing. Cylinder head cracks, drilled either end, grind a vee and stitchlok the crack. Hard chine hull, crack along the join of vertical side strake and bottom plate, ends drilled and 15 gallons of Araldite poured into a wooden form., It worked, too! I have no doubt the ship was scrapped many years later with Araldite still holding the hull together!
Discourage incest, ban country "music".