Mountain safety on Kilimanjaro

Mountain Safety When Climbing Kilimanjaro

Our attitude to safety is unique in that our founder is from time to time contracted by Kilimanjaro National Park Authority to conduct safety work on the mountain and to advise on route selection and accident prevention.

He was responsible for determining the cause of the rockslide in January 2006 that killed three climbers. (See the Western Breach Accident Investigation Report, a discussion of the causes and proposed reaction of the National Park following the tragic accident of January 2006. Further information and videos are available on our dedicated Western Breach page).

Aids to Safety on Kilimanjaro?

Some prospective climbers who have spent time reading the websites of other Kilimanjaro expedition organisers have asked us why, if Team Kilimanjaro are renowned for our mountain safety, do we not appear to place the same emphasis and encourage the same dependence that other companies do, on the use of our safety equipment on our climbs?

For instance, why do we not use our Gamow bags as standard on Kilimanjaro, or administer supplemental oxygen en route to the summit, as some others claim to? Such enquiries - which erroneously presuppose that Gamow bags and supplemental oxygen will ensure that a climber is safer on Kilimanjaro - make it necessary to address the matter of alleged ‘safety’ equipment that some poorly trained agents appear to be marketing as a means of reassuring climbers that they will be safe if they climb with companies that carry all this gear, and of frightening away climbers who have no background in mountaineering, from competitors who often will not carry these items.

Climbers will note that our discussion of these matters may be at odds with what they have read elsewhere. This is a deliberate attempt to address a serious concern we have that climbers have often been misled into believing that the presence of certain items on their kit list is effectively an insurance policy against the risk of death at high altitude.

The reality is, however, that of the thirty or so deaths that occur each year on Kilimanjaro, probably fewer than half would ever have been avoidable, regardless of what equipment had been carried. So while readers may have found elsewhere that climb organisers have advertised their use of some of the following items as a means of assuring climbers of their personal safety, they will please notice that we are hereby strongly discouraging climbers from any psychological dependency on hardware as a means of ensuring their safety.

The mountain is a dangerous environment where when n ear the summit you will breathe only half the oxygen that you are used to. Unless strapped into a re-breather on supplemental oxygen for the assault - which, sensibly, no-one currently offers on Kilimanjaro - no amount of equipment can change this fact and climbers should understand that when attempting Kilimanjaro they are implicitly accepting a known risk that statistically, for every thousand people attempting the summit, one person will die trying, or descending from the summit.

Climbers should be aware that in at least two cases that we have been aware of deaths have occurred within the care of reputable companies that carry hyperbaric chambers. While some deaths are totally unavoidable, some deaths are avoidable and we have at times observed that the inclusion of some items as standard on an operator’s kit list can serve to communicate to an inexperienced guide that a company’s management expects the support staff to go firm and administer prolonged palliative therapy in hostile conditions at high altitude, rather than very brief pharmacological first aid followed swiftly by immediate and rapid descent to a safe altitude, and evacuation to a facility where the casualty will receive professional care and specialist supervision - as TK guides are trained to ensure.

We would therefore wish climbers to understand the limitations of reliance on equipment commonly understood to promote climber safety. In short, it is not hardware that saves lives on Kilimanjaro, but rather the unhesitant implementation by highly practiced guides of tried and trusted procedures. Frequent and accurate communication with your guide, and careful self-monitoring are therefore key to best ensuring your personal safety when climbing.

The following titles cover most of the equipment and facilities that are commonly discussed in connection with safety on Kilimanjaro:

Use of Gamow Bags on Kilimanjaro

We have seen these advised for Kilimanjaro by prominent ‘experts’ but experts with evidently nil awareness of the topography of Kilimanjaro. A Gamow bag / hyperbaric chamber / portable altitude chamber is a very simple portable sealed chamber large enough to accommodate a reclining adult. A foot pump is attached to a valve inlet enabling the chamber to be filled with enough air as is required to simulate a desired altitude with respect to the principle that air pressure increases with lower elevations.

These devices are an excellent idea for expeditions to Mount Everest - where on the north side it can sometimes take four days to reach a safe elevation if evacuation becomes necessary and regular 30 minute sessions inside the bag will hopefully ensure a climber’s SpO2 is temporarily raised to a sufficiently safe level as to stave off the onset of cerebral and pulmonary oedema while the evacuation is effected - but on Kilimanjaro deploying a Gamow bag would generally impose unacceptable delays and is unlikely to be helpful, with immediate descent nearly always being seen as preferable.

A poor quality hyperbaric chamber assembly can take as much as 30 minutes to set up and pressurize. The most likely site where a Gamow Bag would be used is the Crater Camp at 5729m. From a starting point of 5752m (Stella Point) descending rapidly with two support staff it is realistic to expect to be able to descend some 300 to 450 vertical metres within 30 minutes. A 300m loss in height usually represents a sufficient pressure increase to ameliorate a critical condition.

So, Gamow bags are good for mountains from which immediate rapid descent is not practicable, but they are not generally useful on a mountain that it is humanly possible to descend from summit to gate in 2 hours 20 minutes (as was done by Simon Mtuy on 26th December 2006).

It should be understood that Gamow bags are designed not to be airtight and require the user to stop every few minutes to pump more air into the bag so that the pressure can be maintained. This requirement slows down an evacuation considerably. Contrast this with a case on 16th October 2007 in which one of our guides, Deodatus Na’alli, judged that a disabled-from-birth quadriplegic climber’s condition at 5200m merited immediate descent.

The team began the evacuation at 0545 while our office liaised with the zonal park warden, and we had the casualty in the ambulance by 1150, which we had requested to drive part-way up the mountain to 2300m. By 1230, just 6 hours and 45 minutes after beginning the evacuation from close to the summit, the climber was receiving medical care at KCMC in Moshi.

The climber - whose ascent actually established a new world record - recovered fully subsequently and has since himself become a motivational speaker and climb coordinator - encouraging others to attempt the challenge of climbing Kilimanjaro.

Where a climbing group has a pre-determined wish to be equipped with one of our top of the range Gamow bags this is available at a supplementary charge of USD 30 per day.

Using Helicopter Evacuation / Flying Doctor Scheme

In 2006 Team Kilimanjaro were approached by Air Alpha to join forces towards a new privately-run high altitude rescue facility that would involve the use of state-of-the-art Eurocopters that are easily capable of landing on Kilimanjaro’s summit or effecting rapid evacuations from the crater (5730m). The programme would have enabled air support to be with a casualty on Kilimanjaro’s summit within just 25 minutes of being contacted. Regrettably, however, the proposal was rejected by Tanzania National Parks Authority.

However, in 2020 a helicopter evacuation service was established with the capability to evacuate casualties from a landing site very close to Barafu (4680m). Climbers are therefore advised to check the validity of their travel insurance with respect to validity for helicopter evacuation, prior to flying to Tanzania. Also, it should be noted that the helicopter may only effect evacuation under "Visual Flight Rules" (VFR), meaning that if there is cloud cover or high wind, the helicopter will not be able to fly, and we would instead rely on evacuation by stretcher at a typical descent rate of around 500 vertical metres per hour.

Use of Supplemental Emergency Oxygen

Again, rapid descent should be seen as a preferable course. Once a climber is administered oxygen it soon becomes no longer safe for him or her to continue to ascend, as the fact of inspiring more oxygen-rich air than would be enjoyed at sea level, quickly de-activates the body’s triggers that are responsible for promoting the required physiological adaptations to high altitude and there is an elevated risk that the climber may soon become hypoxic once the supply of supplemental oxygen runs dry.

We carry supplemental oxygen on all our expeditions but administer emergency oxygen in conjunction with rapid descent only. We carry the same aluminium canisters and regulators that are supplied to the US State Department, and in our view these are of the most reliable quality available worldwide.

We would reiterate: supplemental oxygen is issued to the support team for use in emergencies only; not as a means of assisting a climber to the summit.

Pulse Oximeter

This is a small plastic clamp fitting over a finger from within which two wavelengths of light are shone into the tissue of the finger. The amount of light of a certain wavelength that Haemoglobin absorbs is correlated to the level of saturation of oxygen of the blood. The resultant reading effectively offers a reliable approximation to the user of the instantaneous amount of oxygen in the person’s blood. The climber should, however, breathe normally while these measurements are being taken as hyperventilation and then immediately holding one’s breathe will generate a low pulse rate / high SpO2 reading.

The reason that we generally advise against the habitual use per se of pulse oximeters as a means of promoting reassurance with respect to a climber's condition and acclimatisation level when at altitude, or of attempting to use an oximeter as an aid to diagnosing the onset of acute mountain sickness, is that in our experience nearly all users have demonstrated a poor understanding of how the reading should be interpreted.

It is commonly assumed that a high SpO2 reading is "a good thing" and an indication that the climber is faring better and is therefore safer than a climber with a lower SpO2. This kind of false interpretation is potentially dangerous to the climber and serves to mislead the person monitoring the climber into thinking that the high reading indicates that the climber is safe, whereas death can occur from altitude-related complications even while a climber has a relatively high SpO2 reading.

Conversely, what we have consistently found is that people in poor condition will often have triggered an emergency response that will raise their SpO2 at relatively low altitudes while the bodies of athletes whose demanding habitual training regimes regularly take them beyond their anaerobic thresholds don’t yet acknowledge any requirement to alter their physiology until quite high up, as the state of mild hypoxia is interpreted by these bodies as something that is relatively normal since an hypoxic state is often experienced during athletes' exacting training regimes on "normal" days when their bodies have long since learned that they are not at risk.

A healthy and adequately acclimatised athlete can therefore show an Sp02 of 70% at Barafu (4681m) while an unfit person might have a reading of 80%. It is perfectly possible to develop a cerebral oedema with a saturation of 80%. Indiscriminate use of oximeters is therefore not advised, as readings are only useful to experienced, qualified persons and the non-device-reliant ability of an experienced guide to recognise danger symptoms in a casualty should be considered preferable.

We carry pulse oximeters on all our climbs. However, we discourage their daily use.

Portable Defibrillators at High Altitude

Sir Ranulph Fiennes claims that his life was saved by a portable defibrillator at Bristol Airport. Indeed, portable defibrillators are known to have saved many lives and are, without question, strongly advised to be available to persons with a known serious cardiac disorder - when not at high altitude

We are yet to hear of a portable defibrillator saving a life on a high altitude expedition, in spite of the fact that they are often advertised on the kit lists of Everest operators competing for business.

In our view it is highly questionable whether any attempted resuscitations are likely to succeed in the Crater where the barometric pressure is typically around 500-550 millibars, and where statistically, fatalities have most often occurred throughout the Kilimanjaro's history.

Where a climbing group has a pre-determined wish to be equipped with one of our Philips Heart Start portable defibrillators this is available at a supplementary charge of USD 30 per day per portable defibrillator. However, the request for inclusion of a portable defibrillator on a climb must be understood to imply that all participants on the climb agree to indemnify our staff against the consequences of resuscitation in an oxygen-starved environment where long term brain damage may likely result.

When considering an ascent of Kilimanjaro we frequently receive enquiries about what climbers should expect in terms of temperatures and precipitation. While this information is of course useful, it tells only a very small part of the story in terms of informing a climber how they should prepare.

We are sometimes asked whether we are able to obtain travel insurance on behalf of our clients. However, we have found over the years that climbers prefer to be in direct contact with the insurers, as in the event of a claim, there is quite a lot of passing information back and forth, and this is generally most easily managed directly, rather than via an intermediary.

Since most summit bids start from high camp at around 2300 - 0100, with exact start time usually depending on the guide's assessment of the group's pace over the preceding few days, most of the approach to the summit happens in darkness.

For some climbers this question is almost irrelevant as they will have to fit their climb into whatever dates they can clear from their busy work or family schedules, though for perhaps the majority, this is probably the first question prospective climbers should ask themselves.

You don't need to climb on these dates shown below. We publish them only for those who wish to climb with others they don't already know. The majority of our clients choose their own dates (at no additional cost), though most request us to open up their climbs for others to join - simply so as to have extra company on the trek.