In Praise of Solo Cave Diving

Solo cave diving is often viewed negatively within the wider diving community, with the assumption that diving with a buddy automatically provides a significantly higher level of safety. However, this assumption deserves examination.

The purpose of this article is not to advocate careless or unnecessary risk-taking, but to explore the situations where buddy diving can introduce additional hazards. Through examples from real incidents and diving experiences, it examines how human factors, decision-making, and group behaviour can influence safety underground.

While the discussion focuses specifically on cave diving, many of the principles apply more broadly to overhead and technical diving environments.

The risks associated with solo cave diving are often highlighted, but the risks created by poor buddy selection, communication failures, or group pressure are less frequently discussed. A buddy can provide essential support, but a poorly prepared, panicked, or inexperienced buddy can also introduce additional dangers.

Solo cave diving requires discipline, preparation, and constant awareness. The key principle remains the same regardless of whether a diver enters a cave alone or with others: safety depends on judgement, training, preparation, and maintaining control.

Buddy-Induced Fatalities: The Herd Instinct

One of the potential problems with buddy diving is the human tendency to feel safer when accompanied by others. This increased confidence can sometimes lead to reduced attention to detail or a willingness to exceed personal limits.

Example 1.1: Little River

Two divers trained only to introductory level entered the Little River cave system using scooters despite lacking appropriate training and experience with the equipment.

The pair travelled a significant distance into the cave. During the dive, one diver lost control of the scooter and struck a mud bank with the propeller, creating a severe visibility loss. In an overhead environment, this type of silt-out can completely remove a diver’s ability to navigate visually.

The second diver panicked and exited the cave, taking the reels with him. The remaining diver attempted to exit through the zero-visibility conditions but was unable to survive. The cave remained inaccessible for several hours after the incident.

This incident raises several questions:

• Would either diver have taken the same risks while diving alone?
• Would the dive plan have been more conservative without the confidence created by having a buddy present?
• What value does a buddy provide if they panic and remove the very equipment required for survival?

Solo cave diving creates a different psychological environment. The increased awareness and caution required may prevent some divers from exceeding their training or experience.

Example 1.2: Sistema Sac Actun, Mexico

A group of eight divers entered the Sistema Sac Actun cave system, divided into two teams of four, intending to complete the Cuzan Nah circuit.

Due to a navigation error, the second team entered the Paso de Lagarta section, which did not form a circuit and did not provide access to air. Despite the increasing risk, the divers continued instead of turning the dive.

Social pressure may have influenced the decision-making process. Calling the dive early or turning around could have been perceived as a sign of weakness within the group.

When the team eventually turned back, their gas reserves were already below the required thirds rule. A desperate exit followed, resulting in one fatality. The remaining divers survived due to a combination of skill, luck, and a significant rescue effort.

This incident highlights the danger of allowing group expectations to override established safety procedures.

The presence of multiple divers does not automatically remove risk. In some circumstances, the group itself can create pressure that encourages poorer decisions which may be avoided if solo cave diving.

Example 1.3: Hodge Close Quarry, United Kingdom

Hodge Close Quarry is frequently regarded as an accessible and interesting dive site within the UK. However, its history demonstrates the dangers of entering overhead environments without suitable training and preparation.

The quarry flooded when excavation exposed an underground water source, creating submerged passages extending beyond recreational diving depths. Despite the obvious overhead hazards, divers have entered the system without appropriate cave diving training or a full understanding of the risks involved.

The site has claimed numerous lives over the years. Many incidents resulted from the same fundamental issues seen elsewhere in overhead environments: inadequate lighting, lack of continuous guidelines, insufficient gas planning, and poor preparation.

On one occasion, a trained cave diver encountered a buddy team preparing to enter the site. The divers warned about the dangers of solo cave diving, yet appeared unfamiliar with several fundamental cave diving principles. They did not appear to carry appropriate numbers of lights, did not intend to use a guideline to the surface, and may not have understood gas management requirements such as the rule of thirds.

This example demonstrates an important point: simply having a buddy does not guarantee safety. A poorly prepared buddy team may be exposed to significantly greater risks than a disciplined solo diver following appropriate procedures.

Buddy-Induced Fatalities: The Desire to Impress

Another potential hazard of buddy diving is the influence of social pressure. Divers may make decisions they would not normally make when attempting to impress an instructor, an experienced diver, or a respected peer.

The desire to demonstrate competence can lead to unnecessary risks and compromised judgement.

Example 2.1: Richard Pyle’s Decompression Incident

Richard Pyle is widely recognised as an accomplished technical diver and researcher. In his account of a serious decompression incident, he describes an occasion where he conducted an additional deep dive despite already experiencing decompression problems earlier that day.

The motivation was partly linked to wanting to complete the dive with an experienced and respected companion before their departure.

The decision resulted in a severe decompression illness incident requiring extensive recovery. Although he survived and later returned to diving, the consequences included a prolonged rehabilitation period.

This example raises an important question: would the same decision have been made without the presence of a respected buddy?

A diver who is alone may be more likely to recognise personal limits and avoid unnecessary pressure. A buddy can provide support, but the presence of another person can also influence decision-making in unexpected ways.

Example 2.2: Attempting to Impress an Instructor

Another example involves a diver attempting to demonstrate ability while diving with an instructor.

During an entrance passage dive at Devil’s Ear, the diver attempted to complete the section at an unnecessarily high pace to demonstrate competence. The effort resulted in excessive gas consumption and extreme exhaustion, causing uncontrolled breathing and stress.

While the diver recovered, the incident demonstrates how the presence of an experienced buddy or instructor can influence behaviour.

The problem was not the presence of another diver itself, but the psychological pressure created by wanting to perform well.

This type of situation highlights the importance of honest self-assessment. A diver should maintain the same conservative decision-making process regardless of who is watching.

Example 2.3: Equipment Failure and Instructor Pressure

A similar situation occurred during training for a stage bottle qualification.

The diver, normally considered careful and methodical, was returning from a dive at Devil’s Ear and attempted to switch from back gas to an oxygen bottle for decompression.

The bottle either failed to activate or had another malfunction. When attempting to return to back gas, the diver discovered that the primary regulator had been moved out of position and the backup regulator could not immediately be located.

The situation escalated into panic and required instructor intervention.

The incident demonstrates how even experienced and normally cautious divers can make poor decisions when affected by pressure, fatigue, or the desire to demonstrate competence.

Buddy-Induced Fatalities: The Panicked Buddy

A buddy is often viewed as the ultimate safety backup. However, a panicked diver can become an additional hazard.

A diver experiencing severe stress may believe they are not receiving enough gas from their regulator and attempt to take another diver’s supply. In an overhead environment, this can create a rapidly deteriorating situation.

A panicked diver may:

• remove another diver’s mask or equipment,
• destroy visibility through uncontrolled movement,
• lose contact with the guideline,
• create additional stress for the entire team.

This does not mean buddy diving is unsafe. It highlights the importance of choosing reliable teammates and recognising when a situation has become unstable.

A stressed buddy, like a stressed solo diver, is a valid reason to terminate a dive.

Example 3.1: Vortex Spring Incident

Four divers entered Vortex Spring, including two experienced cave divers and two open-water divers.

The open-water divers agreed not to enter the cave system beyond their training level but later followed the cave divers into the overhead environment.

Deep inside the cave, one of the open-water divers became frightened and exited without their buddy. Although leaving a buddy is normally considered unacceptable, in this situation the decision may have prevented a more serious incident.

The remaining diver continued deeper and reached a restriction where removing equipment was required to proceed. During the attempt, the diver became trapped, causing significant stress.

When another diver returned to assist, the frightened diver panicked, causing equipment disruption and reducing visibility in the confined passage.

The group eventually exited safely, but the incident demonstrates how an unstable teammate can rapidly increase risk.

A reliable buddy can be an enormous asset. An unprepared or panicked buddy can become the greatest hazard in the cave.

Buddies Requiring Additional Attention: Navigation Problems

Not all buddy problems result in immediate danger. However, a buddy with poor navigation skills can create significant challenges.

When diving with another person, both divers must maintain awareness of their position within the cave system. A diver should never rely entirely on another person’s navigation ability.

Example 4.1: Little River

A diver familiar with Little River cave system entered with a regular buddy. While preparing to descend further into the cave, the lead diver signalled for the buddy to continue.

Unexpectedly, the buddy began swimming back towards the entrance.

Despite having visited the site many times previously, a short period of distraction had affected their sense of direction.

The lesson is simple: every diver must maintain their own awareness of location, regardless of whether they are diving alone or as part of a team.

Example 4.2: Fatality at Orange Grove Sink

A tragic incident at Orange Grove Sink demonstrates the consequences of navigation errors in an overhead environment.

A couple entered the cave system and travelled towards a junction leading towards Challenge Sink. During the return journey, confusion developed over the correct route back to the entrance.

The pair disagreed over the correct direction and eventually separated. One diver survived, but the other did not.

The incident highlights an important principle: every diver must maintain their own awareness of navigation, rather than relying entirely on a teammate.

In a cave environment, being uncertain about the route out is not a minor inconvenience. A small navigation error can quickly become a life-threatening situation.

Example 4.3: Orange Grove again: More confusion.

Another example occurred while navigating the Orange Grove system.

During a dive, the planned route involved taking a jump line into a side passage. The diver leading the dive passed the intended junction, requiring a correction.

Attempts were made to communicate the mistake, but confusion developed. A cloud of silt was disturbed, reducing visibility and increasing uncertainty.

The situation eventually required the use of a jump line to establish a clear route through the passage.

Although the dive ended successfully, the incident demonstrated how quickly confusion can develop, even between experienced divers.

The important lesson is that a diver should never assume their buddy understands the situation exactly as they do. Clear communication, good navigation practices, and independent awareness remain essential.

Buddies You Have To Watch: The Vanishing Buddy

It is axiomatic that if you really need help from a buddy, he will be somewhere around the next corner where you can’t see him. This is One of the practical difficulties of buddy diving occurs when divers have significantly different swimming speeds.

A faster diver may unintentionally move far ahead, creating a situation where the team is technically together but functionally separated.

This can become dangerous because the diver requiring assistance may discover that their buddy is no longer nearby when needed.

A diver should never rely on the assumption that a buddy will always be immediately available. Maintaining a safe personal approach to the dive remains essential.

A fast buddy should not dictate the pace of the dive. Cave diving should always be conducted at the speed of the slowest diver.

Avoiding the Problems of Buddy Diving

Many problems associated with buddy diving can be reduced by avoiding unnecessary pressure and maintaining disciplined decision-making.

Cave diving is not a competition. It is not a demonstration of bravery, speed, or endurance.

A careful diver who maintains their own procedures, gas management, navigation awareness, and equipment discipline will often enjoy a safer and more rewarding experience.

One of the great aspects of cave diving is the opportunity to experience an environment unlike anywhere else. The silence, darkness, and isolation are part of what makes underground exploration so unique.

The goal should not be proving capability against others. The goal should be safe exploration and returning home.

Gear Configuration: Alternatives to Being Your Buddy’s Keeper

One argument frequently made in favour of buddy diving is that a diver must know their teammate’s equipment configuration because they may need to provide assistance during an emergency.

There is truth in this argument. A diver should understand their teammate’s equipment and capabilities.

However, there is also a question of personal responsibility. How much responsibility should one diver place on another?

Some diving philosophies, such as the DIR approach, place significant emphasis on standardised equipment configurations. The reasoning is that if every diver uses the same system, emergency assistance becomes more predictable.

Standardisation has advantages, but there is no single equipment configuration suitable for every cave environment.

Different caves require different solutions. British cave systems, for example, often include tight restrictions where certain configurations may not be practical.

The important principle is not that one configuration is universally correct, but that every diver understands their own equipment completely.

Read’s Buddy Postulates

Professor Charles Read proposed several ideas regarding the balance between solo capability and buddy diving.

First Proposition

• A diver should not conduct a dive with a buddy that they would not be prepared to undertake alone using the same equipment configuration.
• This encourages strong personal responsibility. A diver should maintain sufficient redundancy, gas supply, and preparation to manage problems independently.
• This does not mean every dive should be conducted solo. Instead, it means a diver should avoid relying entirely on another person’s presence for survival.

Second Proposition

• A diver may choose to undertake dives with a buddy that they would not complete alone, but this requires careful consideration.
• The choice of buddy becomes extremely important.
• A reliable teammate who maintains good discipline, appropriate equipment, and conservative decision-making can significantly improve safety.
• However, a poorly chosen buddy can increase risk rather than reduce it.

Third Proposition

• Some divers may decide that solo cave diving is unacceptable and choose to dive only with a trusted teammate.
• In this case, the buddy relationship must be based on complete confidence and understanding.
• The diver must know their teammate’s equipment, skills, limitations, and decision-making process.