Buddy and Solo Diving: Fatal Accident Research

By Rubicon Foundation editorial team

6 min read · 1 November 2026

Research comparing buddy and solo diving in fatal recreational accidents examines how dive organisation relates to emergencies, rescue opportunities and survival. The question matters because a buddy can provide assistance, but the presence of another diver does not by itself prevent an incident or guarantee an effective rescue.

What does buddy-versus-solo research ask?

At its core, this research asks whether fatal recreational diving accidents differ when a diver is accompanied versus diving alone. That comparison involves more than counting people underwater: investigators must consider the circumstances of the dive, what went wrong, and whether another diver was close enough and able to help.

“Buddy diving” can describe very different arrangements. Two divers might stay together and monitor one another, or they might become separated soon after entering the water. Solo diving, meanwhile, ranges from a deliberate, planned practice to a diver who is effectively alone after losing contact with a partner.

The categories therefore need careful interpretation. Incident researchers examine how a dive was planned and conducted, rather than assuming that a buddy was present in a meaningful safety role simply because another person was on the dive.

Why does a buddy matter during an emergency?

A diver in distress may have limited ability to solve the problem independently. A nearby partner can potentially share gas, help manage equipment, assist with an ascent, or summon help. Whether any of these actions is possible depends on distance, visibility, training, equipment and the nature of the emergency.

Many diving emergencies involve interacting problems. A gas-supply issue, equipment difficulty, loss of buoyancy control or medical event can impair a diver’s ability to act; stress can then make a manageable problem harder to resolve. A partner may interrupt that sequence, but only if the partner recognises the problem and can respond safely.

Buddy procedures are thus a layer of risk management, not a substitute for preparation or sound decisions. Communication, agreed signals, gas planning, suitable equipment and a realistic plan for separation shape how useful the partnership is when something changes underwater.

How do researchers analyse fatal accidents?

Accident analysis reconstructs events from available records and considers the sequence leading to death. Relevant questions include whether the diver was alone or separated, what emergency developed, how the dive was organised, and whether a rescue attempt could have altered the course of events.

Comparisons require caution. Fatal-accident records describe deaths, not every dive or every emergency that ended without a fatal outcome. Without an appropriate comparison group, a difference between accident categories cannot by itself establish how much risk a particular diving arrangement carries.

Classification also matters. Records may not capture whether divers maintained contact, how quickly a partner noticed distress, or what assistance was attempted. Those details affect the meaning of “buddy” and “solo” and the strength of any conclusions drawn from the comparison.

What can divers and clinicians take from this research area?

For divers, the practical issue is not simply whether a partner is present; it is whether the pair has a workable plan and can carry it out. Before a dive, agree on communication, separation procedures, gas management and what to do if one diver develops a problem. If a dive is planned solo, its risks, equipment and contingencies require especially deliberate assessment.

For diving physicians and safety professionals, fatal-accident research helps frame questions about individual health, task demands and the rescue environment. A medical condition that matters little on land may become consequential if it affects judgement, consciousness, mobility or the ability to manage equipment underwater. Individual fitness and risk decisions belong with a diving-medicine physician.

Useful considerations include:

Proximity: Can the divers reach one another promptly in the actual conditions?
Recognition: Can each diver identify a problem and communicate it?
Capability: Can the partner assist without creating another casualty?
Contingency: Is there a clear response to separation, equipment failure or a medical emergency?

Why is the comparison still relevant?

Recreational diving practices, equipment and training vary, while underwater emergencies remain difficult to observe and reconstruct. Comparing buddy and solo circumstances is one way to examine how assistance, exposure and rescue opportunity intersect—not a simple test of whether one label is always safer.

The wider value lies in turning accident patterns into questions that can improve planning and prevention. For any particular dive, the decisive details are the environment, the diver’s capability and whether the safety plan works under the conditions actually encountered.

Frequently asked questions

Does having a buddy guarantee a safer dive?

No. A buddy can assist only if the divers maintain useful contact, recognise a problem and can respond. Planning, training, equipment and conditions also matter.

What does “solo” mean in accident research?

It can refer to a deliberately solo dive or to a diver who was alone in practice, such as after separation. The distinction affects how an incident should be interpreted.

Can fatal-accident comparisons determine which practice is safer?

Not on their own. Accident records concern fatal events, and meaningful risk comparisons require suitable information about the wider population of dives and the circumstances of each incident.

An original research-library explainer written by the Rubicon editors. It is not a summary of a specific publication.