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49-9092.00 — Commercial Divers

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	Take appropriate safety precautions, such as monitoring dive lengths and depths and registering with authorities before diving expeditions begin.
	Check and maintain diving equipment, such as helmets, masks, air tanks, harnesses, or gauges.
	Communicate with workers on the surface while underwater, using signal lines or telephones.
	Obtain information about diving tasks and environmental conditions.
	Supervise or train other divers, including hobby divers.
	Inspect the condition of underwater steel or wood structures.
	Inspect and test docks, ships, buoyage systems, plant intakes or outflows, or underwater pipelines, cables, or sewers, using closed circuit television, still photography, and testing equipment.
	Repair ships, bridge foundations, or other structures below the water line, using caulk, bolts, and hand tools.
	Recover objects by placing rigging around sunken objects, hooking rigging to crane lines, and operating winches, derricks, or cranes to raise objects.
	Operate underwater video, sonar, recording, or related equipment to investigate underwater structures or marine life.
	Take test samples or photographs to assess the condition of vessels or structures.
	Cut and weld steel, using underwater welding equipment, jigs, and supports.
	Install, inspect, clean, or repair piping or valves.
	Carry out non-destructive testing, such as tests for cracks on the legs of oil rigs at sea.
	Install pilings or footings for piers or bridges.
	Salvage wrecked ships or their cargo, using pneumatic power velocity and hydraulic tools and explosive charges, when necessary.
	Remove obstructions from strainers or marine railway or launching ways, using pneumatic or power hand tools.
	Set or guide placement of pilings or sandbags to provide support for structures such as docks, bridges, cofferdams, or platforms.
	Drill holes in rock and rig explosives for underwater demolitions.