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Physics & Physiology
Scuba Diving Basics
The foundation of safe scuba diving — pressure, buoyancy, the golden rule of never holding your breath, how your gear works together, and the diver mindset.
Dive Physics
Why water behaves so differently from air — density, pressure, buoyancy, heat loss, light refraction and colour loss, and sound underwater, all explained for divers.
Pressure & Gas Laws
Boyle, Dalton and Henry explained for divers — barotrauma, oxygen toxicity, nitrogen narcosis, nitrox and MOD, and why nitrogen dissolves and causes decompression sickness.
The Environment
Waves & Surf
How waves form, the difference between wind waves and swell, why waves break, surge underwater, and the go/no-go judgement for safe entries and exits.
Currents & Drift Diving
The four drivers of ocean current, how to read current above and below water, up- and downcurrents, drift diving, DSMB use and the lost-in-current procedure.
Tides
What causes the tide, spring versus neap, the daily cycle, slack water, the rule of twelfths, and how to read a tide table to plan safe dives.
Weather for Divers
How high and low pressure, fronts, wind, land and sea breezes, lightning and monsoons affect diving — and how to make the right go/no-go call.
Orientation & Team
Underwater Navigation
Natural and compass navigation for divers — reading the reef and sun, setting a heading, reciprocal courses, the square pattern, estimating distance and finding your way back.
Underwater Communication
Hand signals, the OK principle, emergency signals, light signals at night, attention sounds and surface signals — how divers communicate clearly and confirm every message.
Buddy Procedures
The buddy system done properly — the BWRAF buddy check, positioning, staying in contact, task division, teams of two and three, and the buddy agreements you always make in advance.
Skills & Planning
Trim & Buoyancy
Buoyancy control and horizontal trim — the weight check, weight distribution, BCD and drysuit air, breathing as fine control, fin techniques and hover drills.
Gas Management
Gas management as planning — why you use air faster at depth, usable gas versus tank contents, rock bottom, turn pressure, the rule of thirds, team gas and redundancy.
Air Consumption (SAC & RMV)
How to measure and use your air consumption — SAC in bar/min and RMV in litres/min, predicting consumption at depth, and calculating rock bottom with real numbers.
Decompression Theory
Why you ascend slowly and have a no-decompression limit — tissue compartments, M-values, the NDL, safety stops, residual nitrogen, decompression sickness and flying after diving.
Dive Planning
How to build a complete dive plan — the four questions (What, Where and when, With what, What if), the briefing, the go/no-go decision, and the debrief and logbook.
Diving Emergencies
Self-rescue and staying calm underwater — Stop-Breathe-Think-Act, out-of-air options, free flow, entanglement, cramp, vertigo, uncontrolled ascent and surface problems.
Equipment
Scuba Equipment
How every piece of scuba gear works and how to choose it — mask, fins, exposure protection, BCD types, tanks, the regulator explained, computer and the accessories that are safety, not luxury.
Gear Maintenance
Caring for your scuba gear — rinse, dry and store after every dive, servicing intervals and tank inspections, O-rings, recognising wear, and maintenance on the road.
Marine Biology
Marine Biology
A diver's map of the underwater world — ecosystems, the food chain and trophic levels, symbiosis, coral and bleaching, the day and night reef, and responsible diving.
Reef Fish of East Africa
Learn the reef fish families of East Africa and the Indian Ocean — parrotfish, surgeonfish, butterflyfish, angelfish, wrasses, damsels, groupers and the schooling fish of Tofo and Bazaruto.
Sharks
The truth about sharks for divers — anatomy and senses, the species you meet, their role as top predators, myth versus fact on the real risk, and how to behave in an encounter.
Rays & Manta Rays
Rays explained for divers — the flattened cousins of sharks, the manta ray and cleaning stations, filter feeders versus bottom feeders, stingray safety, and manta conservation at Tofo.
Sea Turtles
Sea turtles for divers — an air-breathing reptile, the species and their diets, the life cycle and natal homing, encounter etiquette, and the threats they face.
Whales
Whales for divers and snorkellers — marine mammals, baleen versus toothed whales, song and echolocation, migration, encounter ethics, and the humpback season at Tofo.
Whale Sharks
The whale shark for divers — the largest fish in the world, a gentle plankton filter feeder, its unique spot pattern and citizen science, encounter etiquette, and why Tofo is world-class.
Venomous Marine Animals
Venomous sea creatures for divers — venomous versus poisonous, stonefish and lionfish, cone snails, blue-ringed octopus, jellyfish, and the first aid that differs by animal.