Construction commercial divers work below the surface of the water to install equipment, such as hydraulic structures, waterways and marine facilities. They also inspect, remove and repair the structures.

Tasks

Tasks include -
(a) Taking safety precautions, such as monitoring dive lengths and depths, and registering with authorities before diving expeditions begin;
(b) Checking and maintaining diving equipment such as helmets, masks, air tanks, diving suits, harnesses and gauges;
(c) Descending into water with the aid of diver helpers, using scuba gear or diving suits;
(d) Working under water to lay and repair bridges, piers and harbour-wall foundations;
(e) Inspecting for suspected damage and making minor repairs to ships' hulls and underwater installations;
(f) Reporting on condition of wrecked ships;
(g) Removing underwater obstructions;
(h) Drilling holes for underwater blasting;
(i) Performing various underwater tasks connected with salvage work or recovering dead bodies;
(j) Gathering shellfish, sponges and other aquatic life forms
(j) Communicating with workers on the surface while under water, using signal lines or telephones;
(k) Obtaining information about diving tasks and environmental conditions.