What is the most logical next event?

How to weld underwater
Identify the site and material of the joint to be welded and clean it.
Most underwater welds involve steel, but metals may vary.
Prepare a chamber to place around the joint (each joint should have a separate chamber).
Chambers range in size-some are large enough to fit several welder-divers, others are only small enough for the welding electrode. Introduce gas into the chamber and pump out the water.