Four Italian Divers Found Dead in Maldives Cave Tragedy | Deep-Water Search Ends in Recovery | 4K

a technical dive cannot be a recreational dive?

What a horrible way to go. I hope the now dead divers were warned and that they knew how dangerous this is.

These media outlets don't seek to explain responsibly 🙄These divers should have known all these information and data. Here I give it to you! Divers experience oxygen toxicity (hyperoxia) and nitrogen narcosis due to the increased ambient pressure at depth, which forces more gases to dissolve into their tissues according to Dalton's and Henry's laws. (Hyperoxia) Oxygen toxicity occurs when a diver breathes oxygen at a high partial pressure PO2, turning a life-sustaining gas into a cellular toxin. Why it happens? At sea level, you breathe 21% oxygen at 1 atm of pressure PO2 = 0.21 atm. As a diver descends, hydrostatic pressure increases by 1 atm for every 10 meters (33 feet) of depth. This compresses the gas, increasing the partial pressure of oxygen. High concentrations of oxygen overwhelm the body's antioxidant defenses, creating excessive free radicals that damage cell membranes and disrupt the central nervous system. How this happens? • The Threshold: The generally accepted safe limit for recreational diving is a PO2 1.4 atm. The absolute maximum contingency limit is 1.6 atm. • Air Depth Limit: When breathing standard air (21% oxygen), a diver reaches the critical 1.4 atm limit at 56 meters (184 feet). • Nitrox Risks: Divers using Enriched Air Nitrox (which has higher oxygen percentages like 32 or 36% to extend bottom time) reach this toxic limit at much shallower depths. For example, 32% Nitrox hits 1.4 atm at just 34 meters (111 feet). • The Consequences: Central Nervous System (CNS) toxicity causes visual tunnel vision, ringing ears, dizziness, and violent grand mal seizures. Underwater, these seizures almost always lead to the diver losing their regulator and drowning. Severe Nitrogen Narcosis Nitrogen narcosis—often called "rapture of the deep"—is a reversible alteration in consciousness that acts similarly to alcohol intoxication or nitrous oxide inhalation. Why it happens? Nitrogen ((N2) makes up about 78% of standard breathing air. It is an inert gas, meaning the body does not metabolize it. Under high pressure, nitrogen dissolves easily into the fatty myelin sheaths surrounding neurons in the brain. This physical presence of nitrogen disrupts the normal transmission of electrical signals between brain cells, causing anesthetic effects. How it happens? • The "Martini Rule": A common rule of thumb is that every 15 meters (50 feet) of depth on air feels like drinking one martini on an empty stomach. • Mild Narcosis (30-40 meters / 100-130 feet): Divers experience lightheadedness, mild euphoria, delayed response times, and overconfidence. • Severe Narcosis Below 40 meters (130 feet): Cognitive function drops drastically. Divers may suffer from severe confusion, memory loss, hallucinations, terror, and completely irrational behavior (such as taking their regulator out to offer it to a fish). • The Limit: At depths approaching or exceeding 56 meters (184 feet), narcosis becomes severe enough to cause blackouts or a complete inability to respond to life-threatening emergencies.

Its a very kind gesture by the Maldives authorities to recover those dead divers but it would have been better to have left the 5 of them in their watery graves ...

No. The robot did.