Waco Scuba

SCUBA Course Overview

Orientation Session: This is simply a one-hour discussion on the course construction, schedule, fees, expectations, form distribution, instructor(s) introduction(s), and so on.

Academic Sessions (each academic session is two hours long):

  • First Session: Legal and medical issues; Diver’s Alert Network (DAN), the characteristics of and taking care of snorkel equipment (mask, snorkels, fins, booties, wetsuits, dive skins, save a dive kits).
  • Second Session: The characteristics of and taking care of scuba equipment (tanks, tank valves, regulators, buoyancy compensators, gauges, weights, weight belts, contingency scuba equipment, dive flags, lights, timing devices, save a diver kits, first aid kits, dive knives, floats, etc).
  • Third session: The physics of diving (the relationship between pressure, volume, and temperature), the characteristics of air (composition, weight, pressure exerted on the surface) and the characteristics of water (weight, light, sound, buoyancy, color, temperature). Lastly, the environmental influences on diving (waves, surf, surge, ripcurrents, longshore currents, etc).
  • Fourth Session: The physiology of diving (gas transport into and out of the alveoli), the characteristics of the lungs, lung over-pressurization injuries (subcutaneous emphysema, mediastinal emphysema, pneumothorax, arterial gas embolism), the effects of gases on the body (oxygen toxicity, hypoxia, hypercapnia, hypocapnia, nitrogen narcosis, carbon monoxide poisoning), barotraumas (sinus, ears, masks, teeth, masks, gastrointestinal tract), hyper and hypothermia, the issues associated with drugs and diving, women’s issues in diving (makeup, jewelry, cold tolerance, body size & equipment issues, menstrual cycles, pregnancy, etc).
  • Fifth Session: The issue of decompression sickness and diving (dive tables, ingassing, outgassing, dive profiles, symptoms and treatment of the bends, special issues such as lying after diving, exercising after diving, reverse dive profiles, working hard and/or being cold during diving), using dive computers.
  • Sixth Session: Filling out your NAUI dive logbook.
  • Seventh Session: Academic exam.


Pool Sessions (each pool session is two hours long). Note: Every pool session begins by swimming a minimum of 2 laps (4 lengths of the pool).

  • First Session – Swim assessment: The student must be able to swim 4 laps (8 lengths of the pool; any stroke, no time limit), conduct a survival swim for 10 minutes (treading water, floating, or survival swimming), and must also be able to swim underwater a minimum of 50 feet on one breath of air with no push-off or dive (however, the use of masks and/or weights is permissible).
  • Second Session: Using masks, fins, and snorkels.
  • Third Session: Assembling, checking, and briefly using scuba equipment.
  • Fourth Session: Basic scuba skills (shallow water entry, regulator clearing, regulator retrieval, mask clearing, mask removal & replacement).
  • Fifth Session: More advanced scuba skills (review of the basic skills of regulator clearing & retrieval & mask removal, neutral buoyancy, and gear removal & replacement, both at and below the surface).
  • Sixth Session: More advanced scuba skills (deep water entries, octopus breathing, buddy breathing).
  • Seventh Session: More advanced scuba skills (basic rescue issues, diver tows, cramp relief), and checkout dive rehearsal.

Waco Family YMCA

Blue Lagoon - Checkout Dives

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