Solo diving is one of the most debated topics in scuba diving. Some divers view it as reckless and unnecessary, while others consider it a legitimate form of diving when performed with proper training, experience, and redundancy.
The reality is more nuanced.
Solo diving is not automatically irresponsible, and many highly experienced divers practice it under certain conditions. However, there is a reason why most training agencies strongly emphasize the buddy system and team diving philosophy.
Underwater, even small problems can escalate very quickly. Diving often removes immediate access to the surface, limits communication, introduces pressure-related physiological effects, and places humans in an environment where mistakes are often unforgiving. This is why many divers still consider team diving one of the most important layers of safety in scuba diving.
The Buddy System: The Foundation of Diving
Most recreational scuba training is built around the assumption that divers will dive with a buddy. From the very first open water course, divers learn procedures based on teamwork:
• Buddy checks before entering the water
• Gas sharing procedures
• Shared navigation
• Mutual monitoring of depth and air
• Assisting with stress or panic
• Cramp relief
• Helping during equipment issues or entanglement
The reason is simple: a second diver can often solve a problem before it becomes an emergency.
Many recreational diving incidents are caused not by catastrophic failures, but by stress, poor decision-making, distraction, task overload, or small mistakes that gradually build into serious situations. A buddy often interrupts that escalation before it becomes critical.
Loss of Immediate Emergency Assistance
One of the biggest concerns with solo diving is the removal of immediate assistance underwater. If something goes wrong, a good buddy can often help within seconds.
Common situations where a buddy can help include sharing gas during an out-of-air emergency, managing entanglement situations, assisting during cramping or exhaustion, or helping a distressed diver reach the surface safely.
Since many diving emergencies involve stress and reduced decision-making ability, having a buddy with a calmer perspective becomes especially important.
Medical Emergencies Underwater
A diver may experience various medical emergencies underwater. These may include vertigo, panic, hypoxia (most commonly associated with CCR diving), hyperoxia, hypercapnia, cardiac problems, loss of consciousness, severe narcosis, disorientation, reverse blocks, and many others.
If a diver is alone, there may be nobody nearby to recognize the issue early or assist with recovery.
One of the major psychological realities of diving is that many emergencies become dangerous because stress reduces the diver’s ability to solve the situation effectively.
Equipment Failures Are Harder to Manage Alone
Modern scuba equipment is highly reliable, but failures still happen. O-rings can burst, fins can be lost, masks dropped, computers can fail or run out of battery, and drysuits can flood.
In team diving, redundancy partly comes from another diver, while in solo diving, the diver must personally carry and manage all redundancy. This alone required a big portion of capacity, significantly increases equipment load, task management, and self-rescue responsibility. Additional equipment also introduces additional failure points, increased drag, and greater task-loading requirements.
Technical divers often carry redundant systems as well: backup lights, bailout tanks, cutting devices, computers, and more. But even then, equipment redundancy does not fully replace human redundancy.
Human Error Is Often the Real Problem
One of the most misunderstood aspects of diving accidents is that many are not caused by a single catastrophic event or isolated failure. In reality, accidents often result from a chain of common factors:
• Poor gas management
• Descending deeper than planned
• Task fixation
• Stress accumulation
• Distraction
• Skipped procedures
• Navigation mistakes
• Environmental changes
• Delayed decision-making
This is sometimes referred to as an “error chain,” and at the center of it is usually the same factor: the human.
A teammate can often identify stress, navigational errors, a rising breathing rate, or incorrect hose routing before the diver themselves notices them. In many cases, a buddy is the one interrupting the chain before it becomes life-threatening.
The Psychological Side of Team Diving
One of the most underrated benefits of buddy diving is psychological support.
For less experienced divers, stress may come from unexpected current, cold water, reduced visibility, or narcosis. Even experienced divers can become overwhelmed. For them, stress factors may come from complex environments, overhead conditions, task loading, or equipment malfunctions where immediate ascent is not possible.
A teammate nearby can significantly reduce anxiety and improve decision-making under pressure. This is particularly important because panic underwater can escalate extremely quickly. Sometimes, simply knowing that another competent diver is nearby reduces stress and increases overall situational control.
Team Diving in Recreational vs Technical Diving
The challenges faced by recreational divers and technical divers are often very different. They are all real, however, and can be equally dangerous for each group.
While recreational divers are more commonly affected by anxiety, buoyancy issues, mask flooding stress, gas awareness problems, or low-visibility discomfort, technical divers are often less likely to panic because of a flooded mask or a minor equipment issue.
However, technical dives frequently involve significantly higher-consequence environments where direct ascent may not be possible due to overhead environments or decompression obligations. Gas planning becomes critical, navigation complexity increases, equipment systems become more advanced, and failures require immediate and disciplined responses.
A technical teammate may assist with gas switches, line protocols, decompression management, CCR failure procedures, valve failures, and more.
What About Solo Diving Training?
Some agencies do offer solo diving programs or self-reliant diver certifications. These programs usually require significant diving experience, redundant systems, more conservative planning, and extensive self-rescue ability.
Importantly, these programs do not claim solo diving is safer than buddy diving.
Instead, they attempt to reduce the additional risk created by the absence of a teammate. Even among highly experienced technical divers, solo diving is generally viewed as increasing risk rather than eliminating it.
Most diving organizations continue to support buddy or team diving because incident data consistently shows that early intervention and shared problem-solving improve safety outcomes.
Technical diving philosophies such as DIR (adopted by GUE) place particularly strong emphasis on team diving, standardization, shared procedures and responsibilities, mutual awareness, and collective problem-solving. In these systems, the team itself becomes part of the safety infrastructure.
The philosophy is simple: underwater, redundancy is not only about equipment, but also about people.
The Most Common Arguments for Solo Diving
Many divers who practice solo diving approach the topic from a very different perspective. Their arguments are usually not based on eliminating risk, but on controlling it differently.
Argument 1: Unreliable or Poorly Trained Buddies
One of the most common arguments made by solo divers is that not every buddy increases safety. In recreational diving especially, buddy pairs are often formed randomly on dive boats between people with different experience levels, different gas consumption rates, different situational awareness, different skills, and different stress tolerance.
Many experienced divers have encountered situations where a buddy drifts too far away, stops monitoring the team, panics, consumes gas rapidly, fails to communicate properly, or creates additional stress instead of reducing it.
Because of this, some solo divers argue that an unreliable buddy can become a liability rather than a safety asset. Their perspective is often: “I trust my own preparation more than an unknown diver.”
Argument 2: Self-Reliance and Personal Responsibility
Another major reason divers choose solo diving is the philosophy of self-reliance.
Some divers believe every diver should be capable of solving problems independently, managing gas without depending on others, handling navigation alone, executing self-rescue procedures, and maintaining situational awareness without assistance.
From this perspective, solo diving forces stronger discipline, planning, and accountability.
Many solo divers argue that relying too heavily on a buddy can create complacency, especially if divers subconsciously assume another person will solve their problems for them.
Argument 3: Greater Peace and Focus
Some divers describe solo diving as psychologically calming.
Without needing to constantly monitor another diver, they feel able to move at their own pace, focus more deeply on photography or videography, observe marine life more quietly, reduce distractions, or enter a more meditative state underwater. This is especially common among underwater photographers and naturalists who value silence and independence. For some divers, solo diving feels less stressful than diving with an unpredictable partner.
Argument 4: Professional and Practical Reasons
In some situations, solo diving occurs for practical reasons.
Examples include scientific divers performing independent tasks, underwater photographers separating from groups, cave rescue or body recovery divers searching for missing divers, or exploration divers surveying environments.
Some professional divers spend portions of dives effectively operating alone, even when a team is technically nearby.
Argument 5: Human Error
Interestingly, solo divers often use the same human-factors argument as team divers — but from the opposite perspective.
Supporters of team diving say: “Another diver catches your mistakes.”
Supporters of solo diving may respond: “Another diver can also create mistakes.”
Some experienced divers therefore argue that removing an unreliable teammate can simplify the dive and reduce variables.
Why Many Divers Still Prefer Team Diving
Even with these arguments, most diving agencies and many experienced divers still support buddy or team diving as the safer general approach.
The reason is that underwater emergencies are often fast, psychological, stress-driven, and difficult to predict. A teammate provides shared awareness, immediate assistance, emotional stabilization, decision-making support, and additional problem-solving capability.
This becomes especially important in challenging environments or high task-loading situations, where another competent diver often provides a safety layer that skills or equipment alone cannot fully replace.
Final Thoughts
The debate around solo diving is often oversimplified.
The real difference is more often:
• Competent vs incompetent
• Prepared vs unprepared
• Disciplined vs careless
Solo diving does not automatically mean reckless behavior. Many highly trained divers practice it responsibly within conservative limits. However, solo diving removes one of the most important safety layers in scuba diving—another thinking human being.
Many diving accidents demonstrate how valuable another diver can become when stress, narcosis, equipment failure, or medical emergencies occur underwater.
