Avalanche safety gear is often purchased as a checklist item — beacon, probe, shovel, done. But gear you don't understand and haven't practiced with is not safety gear. It's a false sense of security attached to your body while you make decisions as though you're protected.
This guide explains how each piece of backcountry safety equipment actually works, what the companion rescue sequence looks like from the moment an avalanche releases to the moment a buried person is extracted, and what practice and training should accompany the gear.
We stock a full range of avalanche safety equipment from BCA, Mammut, Black Diamond and Pieps at our Richmond store. But we're writing this because the best thing we can do for the Australian backcountry community is make sure the people buying this gear understand it — not just carry it.
Why the 15-minute window defines everything
Avalanche burial survival follows a curve. In the first 15 minutes after burial, survival rates are high — roughly 90% of victims buried shallowly and recovered quickly survive. After 15 minutes, that number drops sharply as asphyxiation and trauma take effect. By 35 minutes, most burial victims who haven't been recovered are no longer alive.
This 15-minute window is why the companion rescue system — beacon, probe, shovel — exists and why every person in a backcountry group must carry all three. A buried person's survival depends on the people with them searching and extracting them within that window. External rescue services — helicopter, ski patrol, search and rescue — cannot reach most Australian backcountry terrain within the survival window. The group is the rescue.
The three pieces of gear correspond to three sequential phases of a companion rescue: locate (beacon), pinpoint (probe), extract (shovel). Each phase is time-critical. A failure at any phase — missing beacon, beacon not searched properly, wrong shovelling location — extends the time to extraction and reduces survival probability.
The avalanche beacon — how it works
An avalanche beacon — also called an avalanche transceiver — has two operating modes: transmit and receive. In transmit mode, it broadcasts a continuous 457kHz signal. In receive mode, it detects and displays the direction and distance to any other transmitting beacon in range.
All modern digital beacons operate on the same 457kHz international frequency standard. This means a BCA Tracker, a Mammut Barryvox, an Ortovox 3+, a Pieps Micro — all cross-compatible. You can search for any brand's buried beacon with any brand's searching beacon.
Before you leave the car park: every person turns their beacon on and verifies it's transmitting. One person switches to receive mode and walks past each other person to confirm each beacon signal is detected. This takes two minutes and catches a dead battery or accidental receive mode before you're in the field.
When an avalanche releases: anyone not caught switches immediately to receive mode. This is the moment when beacon use begins. The unburied members of the group are now searching for the buried person.
The beacon search — three phases
Phase 1 — Signal search: the searcher sweeps the debris field in a systematic pattern (usually parallel lanes across the debris) until they pick up a signal. Modern triple-antenna beacons have a search distance of around 40–50 metres depending on burial depth and antenna orientation. A systematic search covers the debris methodically rather than randomly.
Phase 2 — Coarse search: once a signal is detected, the beacon display shows distance and direction to the buried transmitter. The searcher follows the directional arrow, moving efficiently toward the signal while watching the distance decrease.
Phase 3 — Fine search: when the distance reading drops below about 3 metres, the searcher slows and uses a bracketing pattern — moving until distance increases, backing up, moving perpendicular — to find the point of minimum distance. This is where the probe goes in.
Multiple burials complicate this sequence significantly. Modern beacons have multiple burial modes that help the searcher work through more than one buried person sequentially. Understanding how your specific beacon handles multiple burials, and practicing it, matters for groups of three or more.
What good beacon search looks like: fast, systematic, calm. Panic wastes time. A practiced searcher moves confidently because the process is automatic. This is why pre-season beacon drills matter — the search happens in the worst possible conditions, with injured partners, under pressure, and the process needs to be instinctive.
Beacon batteries and care
Alkaline batteries are standard. Lithium batteries perform better in cold and are preferred for backcountry use. Replace batteries at the start of every season. Store your beacon in a cool, dry place away from strong magnetic fields (which can interfere with antenna calibration). Check battery level before every tour.
The avalanche training centres at Mt Hotham and Thredbo provide live practice on buried transponders in actual snow conditions. The Mt Hotham ATC is located near the equipment shed on the Machinery Spur track from the Mt Loch carpark — follow the ATC signs for 500 metres. At Thredbo, the ATC is at the top of the Kosciuszko chairlift near the Basin T-Bar. Both were coordinated and installed by the Mountain Safety Collective. Use them before and during the season, not just once.
The avalanche probe — how it works
The probe confirms burial location and depth before you commit to shovelling. This matters because committing your shovel in the wrong spot adds minutes to the extraction and is exhausting.
When the beacon fine search gives you a minimum distance point, the probe goes in at that location. Probes collapse down to 35–50cm for carrying and deploy to 240–320cm in one action — a central cord runs through all sections; pulling the handle tightens the cord and locks the sections rigid simultaneously. A practiced deployment takes under five seconds in gloves.
How to probe: start at the beacon minimum point and probe straight down. If you don't find the victim on the first probe, work outward in an expanding spiral — first probing at 10cm spacing, moving outward. When you hit something that doesn't feel like snow (softer, more yielding, sometimes a hollow sound), you've found the burial location.
Depth reading: probe shafts are marked in 10cm increments. When you locate the victim, note the depth. If the burial is deep (over 1.5m), this affects your shovelling strategy — you'll need to work in a V-shape or conveyor belt to move snow efficiently.
Leave the probe in place when you begin shovelling. The probe marks the exact burial point and helps you maintain orientation as you dig. Remove it carefully once you've confirmed the victim's position during excavation.
What to look for in a probe: minimum 240cm length (320cm is better for deep burials), cord-tensioning deployment that locks completely rigid, clear depth markings, and enough shaft stiffness to penetrate compacted debris without deflecting. BCA, Black Diamond and Mammut probes at mid-to-upper price points all meet these requirements.
The avalanche shovel — how it works
The shovel is the hardest part of companion rescue, physically. Compacted avalanche debris is dense — often described as setting like concrete as it decelerates and compresses. Moving it efficiently under time pressure, in cold, in gloves, while potentially injured or in shock, is genuinely exhausting.
A dedicated avalanche shovel is engineered specifically for this scenario. An undersized blade or a flexible shaft that bends when you lever compacted debris directly reduces how much snow you can move per minute. In a timed burial scenario, that engineering difference matters.
The shovelling strategy
For burials under 1 metre: shovel directly above the probe point, working efficiently to clear snow. Maintain your orientation relative to the probe.
For burials over 1 metre: direct overhead shovelling becomes inefficient because you're throwing snow uphill. The V-conveyor technique is more effective: multiple shovellers work in a line below the burial point, with the lead shoveller cutting into the snow at an angle and passing loose snow back to the next person, who throws it clear. This requires three or more people operating as a coordinated system. The person at the front does the hardest work and rotates out regularly.
Creating an airway: as you get close to the victim, slow down and work carefully to avoid injuring them with the shovel. Once you reach the victim's face or chest, clearing the airway is the first priority — even before fully excavating the body. A burial with the airway blocked is the primary cause of asphyxiation.
What to look for in an avalanche shovel: large blade area (wider is better for volume, though not so large it becomes uncontrollable), D-handle or T-handle grip that works in gloves, telescoping shaft extending to at least 80–90cm for full shovelling range, and blade rigidity that holds under leverage. The shaft connection point is where cheaper shovels fail — a blade that flexes or disconnects when levering is useless.
Putting it together — the companion rescue sequence
This is the complete sequence from avalanche release to victim extraction:
1. Mark the last seen point. Before searching, note or mark where you last saw the buried person. Burials are more common below this point.
2. Switch to receive. Unburied group members switch beacons to receive mode immediately.
3. Check for secondary hazard. Before entering the debris, assess whether additional avalanche release is possible. A two-second check can save lives. Don't expose your whole group to secondary release while searching.
4. Begin beacon signal search. Systematic sweeps from the last seen point downhill through the debris until a signal is detected.
5. Coarse search. Follow directional arrow toward the buried beacon, watching distance decrease.
6. Fine search. Slow down below 3m. Bracket to find the point of minimum distance.
7. Probe. Probe at the minimum point, working outward in a spiral until the victim is located. Mark depth.
8. Shovel. Begin efficient excavation. Use V-conveyor technique for deep burials. Rotate shovellers to maintain pace. Slow when close to the victim.
9. Clear airway first. Airway before full extraction.
10. First aid and PLB. Once the victim is extracted, manage injuries and activate your PLB if rescue is required.
This sequence takes practice to execute quickly. An AST 1 course runs through it multiple times, in field conditions, until the steps are automatic. Reading about it is useful. Practicing it is irreplaceable.
AST training in Australia
AST 1 (Avalanche Safety Training Level 1) is the minimum standard before independent backcountry travel. It is a one-day course covering companion rescue (including the beacon search sequence above), introduction to snowpack and terrain assessment, and group decision-making frameworks. AST 2 is a deeper multi-day course for riders who want to develop more sophisticated terrain assessment skills.
The Mountain Safety Collective maintains a list of accredited training providers in Australia under their Alpine Guiding Partners program. Current providers include:
- Alpine Access Australia — AST 1 courses with CAA-accredited instructors, both NSW and Victoria
- Blizzard Academy (Kyle Boys) — AST 1 and Australia's only Canadian-accredited AST 2 course
- K7 Mountain Guides — backcountry skills including avalanche safety
- The Climbing Company — IFMGA-certified guides, backcountry courses
- Thredbo Backcountry Tours — introductory and guided backcountry experiences including safety education
Check MSC's current guide listings at mountainsafetycollective.org/guides for up-to-date course offerings and availability.
Daily conditions reports — read them before you go
The Mountain Safety Collective publishes daily backcountry conditions reports throughout the Australian snow season for Victorian and NSW terrain. Reports cover avalanche hazard rating (using the international 1–5 scale), snowpack observations, weather forecast and specific terrain notes from field observers.
Checking the MSC report before any backcountry day is not a bureaucratic box-tick. It's how you know whether the terrain you're planning to enter is at elevated hazard — and whether the decisions you make that day should be more conservative than you'd planned. The reports are free to access at mountainsafetycollective.org. MSC membership funds the forecasting operation that makes them possible.
The airbag pack — a supplement, not a substitute
Avalanche airbag packs deploy a balloon that inflates rapidly when triggered, increasing the wearer's volume and using the natural sorting mechanism of avalanche debris (larger objects rise to the surface) to reduce burial depth. The survival data for airbags is positive — they meaningfully increase the odds of surviving a burial, particularly in scenarios where depth would otherwise be fatal.
Airbags are not a substitute for beacon, probe and shovel, and they are not a substitute for terrain decision-making. A rider with an airbag pack still needs to carry all three safety items, still needs to complete AST 1, and still needs to make sound terrain choices. The airbag improves outcomes in a burial that happens despite all of the above. It does not prevent the burial.
We carry BCA and Black Diamond airbag packs. Shop: Avalanche Airbag Packs
Buy the gear — then learn to use it
We stock a complete range of avalanche safety equipment from BCA, Mammut, Black Diamond and Pieps — everything from entry-level beacons through to advanced multi-burial search systems and professional shovel setups. All of it is in stock at our Richmond store.
When you buy safety gear from us, we'll walk you through how each piece works. We're not guides and we're not a training provider — for that, go to MSC's Alpine Guiding Partners. But we can make sure the gear leaves our store with an owner who understands what they've bought.
Relevant reading: Resort vs Backcountry Snowboarding — What's the Actual Difference? · What Do You Need to Go Splitboarding? Complete Kit Guide · Jones Avy Savvy Course — Get Backcountry Ready
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