Bumps on a steel keel - PICS

[techmans]

Not much to worry about here.Weld up the crack and leave the rest alone.Structurally it will be fine.
I did naval architecture and metal science at university, specialized in welding.Was chief welding, NDE and metals engineer at a nuclear reactor vessel manufacturing shop.
No reason to get a metallurgist; the worst steel plate is good enough for the application.
For any steel boat of this size you always have to use thicker plate for sheer cosmetic reasons than you need for structural integrity.For the keel, which is out of sight, they may have ignored the rule and ended up with the bumps and the tear, possibly aided by freeze-thaw cycles.