Underwater work
Underwater work is work done underwater, generally by divers during diving operations, but includes work done underwater by remotely operated vehicles and manned submersibles.
Skills commonly used by all professional diving occupations
Underwater navigation
- Pilotage
- Compass navigation
- Use of a guideline or jackstay
Underwater searches
- Circular search
- Pendulum search
- Jackstay searches
- Compass searches
- Directed search
Rigging and lifting
- Basic ropework, knots and splices, tackle
- Rigging slings cargo nets and spreaders, lifting hooks and shackles
- Lifting bags
- Chain blocks, tirfors and pullers
Inspection, measuring and recording
- Underwater photography – Genre of photography
- Underwater videography – The branch of electronic underwater photography concerned with capturing moving images
Use of basic hand tools
- Hacksaws
- Hammers
- Cold chisels
- Pliers
- levers, wedges and crowbars
- Screwdrivers and wrenches
- Pipecutters and bolt cutters
Skills specific to specialist occupations
Underwater oxy-arc cutting
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Underwater fillet weld in a training pool
- Erecting formwork and shuttering (civils)
- Concrete placement using a tremie or skip (civils)
- Oxy-arc cutting (salvage, ships husbandry, offshore)
- Underwater welding (salvage, ships husbandry, offshore)
- Use of pneumatic and hydraulic power tools {ships husbandry, civils, offshore, salvage}
- High pressure jetting (ships husbandry, civils, offshore)
- Hydraulic bolt-tensioning (offshore oil and gas)
- Fitting and maintenance of wellhead components (offshore oil and gas)
- Hull cleaning and inspection (ships husbandry)
- Mooring inspection and maintenance (ships husbandry, offshore)
- Pipeline inspection (offshore oil and gas)
- Propeller polishing (ships husbandry)
- Inspection and replacement of cathodic protection anodes (ships husbandry, offshore)
- Explosive demolition (clearance, civils)
- Bomb disposal (military, public safety}
- Archaeological excavation (archaeology)
- Search and recovery (public safety)
- Forensic evidence preservation (police)
- Search and rescue (public safety, police)
- Site surveys and mapping (scientific, archaeology)
- Biological sampling and tagging (scientific)
- Core drilling (scientific)
- Setting up and recovery of instrumentation (scientific)
- Transect surveys (scientific)
References
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