The most costly item is a scuba compressor. Students are often shocked to find out that compressing a closet full of air at 14.7 pounds per square inch into a tiny cylinder at a pressure of 3000 pounds per square inch, requires a multi-stage compressor and accessories costing as much as a family car!
Maintenance of the compressor is costly as well. Special breathing air filters costing hundreds of dollars must be replaced regularly to keep you safe. Air must be collected and sent to a lab for detailed analysis to ensure safety.
Gear must be washed after every dive and regulators sanitized which is wet messy work. Gear must be serviced annually, tanks hydrostatic tested every five years and visually inspected annually.
Liability insurance is extremely costly. Certification agency annual dues, class materials and certification fees are a significant portion of your class tuition.
Travel costs, pool fees, it all adds up.
If you think your scuba course is costly- please think again.
Chances are your instructor truly loves to introduce students to the underwater world and is working very hard for very little, sometimes zero money.