Why can’t we get a handle on this safety thing? (1998)
ushpa.org
ushpa.org
I think a useful insight, not just for dangerous sports but anything with high risk of failure and large decision volume.
> The overriding determinant of pilot safety in hang gliding is the quality of pilot decision making. Skill level, experience, quality of equipment; all those things are not determinants. What those things do is determine one’s upper limits. More skill gives you a higher limit, as does more experience or better equipment. But safety is not a function of how high your limits are, but rather of how well you stay within those limits. And that, is determined by one thing; the quality of the decisions you make. And
This, of course, raises the question of whether the latter is a safe option. This can be approached statistically - are the incident rates higher in training than among skilled pilots? Only if they are do we have to move on to the second question, which is how to safely acquire the skills needed to have the option to be safe.
However, pretty much every time that happens I force myself to research the safety situation (especially given that I have a daughter now) and I can't justify the risk to myself.
This part pretty much captures it:
> And that, is determined by one thing; the quality of the decisions you make. And how good do those decisions have to be? Simply put, they have to be just about perfect.
Also - "perfect" in this case means you have to be _very_ conservative, especially as a beginner, or as someone who doesn't fly regularly. Which, in turn, is going to result in less skill maintenance.
Turbulence being invisible + the power of air + the limits of these unpowered flying devices in terms of control and cushioning adds up to a lot of risk if this is an activity you do over a number of years.
I even flew RC slope planes for a while instead, which really illustrated how easily you get on the wrong side of the weather, with much lower consequences!
I've never been hang gliding, but I get the sense from the article there there's another factor at play here that may be less applicable to powered pilots that should have a good understanding of the risks from their required training and pre-flight planning. An important element in the essay seems to be that hang glider pilots don't have a good understanding of the risks - due to the way crashes are perceived in the community - and that is a prerequisite for doing a competent risk analysis and formulating a safe plan in the first place. They're blind to the risks they're taking, and consider the sport safe, even when they are frequently crashing.
The teaching point of the essay to me, is more that if something can be 'safely' accomplished 99% of the time, but 1% of the time it is deadly, it is extremely unsafe, but due to confirmation bias from 'always' being successful, won't be seen as risky, and in those situations we humans need to be very deliberate about our decision making.
> it is imperative that we create the systems and the culture ... to help educators learn from errors rather than feel stigmatized by them
Aviation has a very strong culture of publishing and scrutinising near misses and mistakes, and that culture leading to positive feedback loops that improve safety.
Medicine (historically, and the book's argument) chalks up mistakes to "one of those things".
Applying this to hang gliding, I managed to find quite a few careful analysis examples of accidents on forums. Obviously less scrutinised than aviation, but probably fair to say generally has a culture of safety consciousness, but in the context of an inherently deadly sport. Fair to say aviation, medicine and hang gliding all are varyingly deadly.
[1] https://vpaonline.org/wp-content/uploads/principal_resources...
This narrative is so compelling because there is a certain underlying truth to it. You don't really appreciate how effective your tires are until you reach that boundary where they start to slide out. You need to jump a few times before you get a feeling for how to jump. You can minimize your risk in other ways, but you can't eliminate it entirely.
But on the whole, it feels like there is a culture within mountain biking (though certainly not amongst all riders) that you should always be pushing your boundaries to improve and that if you are eking out thinks out at 99% or whatever like the guy talks about in the article, you're doing things right.
I think on a bike it's fine to push your limits, because the consequences are less severe than for hang gliding, especially if you aren't doing big drops.
Trials riding is technical, but it isn't fast, so one unexpected thing is that you get better at crashing. Kind of like in Judo, where there is a correct way to fall, falling often enough at slow to moderate speeds teaches you how to fall better.
Now I mostly ride cross country, but every once in a while, when I get into a sketchy situation, I fall like a cat, whether it be over the bars, off the back, hopping off the side, I have a deep well of experience from previous crashes to draw upon.
I'd say in mountain biking the enemy isn't falling or crashing, it's falling or crashing at speed. I _know_ it's fun to go fast, but if you switch your mindset from: "I'm going to get through this section faster than you" to "I'm going to get through this section _better/cleaner_ than you." you can keep the fun alive while keeping the consequences down.
So what is 'better,' it could be without putting a foot down, without shifting down to the granny gear, without skidding etc...
This is why I think mountain biking is way more fun than road riding. I don't have to have elite level fitness, or massive quads to be 'good' at mountain biking. Take a roadie out on a mtn bike ride for the first time and they will probably blow all the steep climbs at first, cos they don't have experience in modulating traction through the back wheel. Eventually they would learn to project though the bike and feel where the back wheel is touching the ground at all times, which takes your riding to the next level.
1: Example: https://www.youtube.com/watch?v=CRZJylpYJec
As the saying goes, “There are no bold and old pilots.” If flying and hang gliding teaches you anything, it is to take the right decisions within the framework of safety you have experience with. It’s a bit like knowing how to ride a bicycle, but you want to do a wheelie when it rains – not the right decision.
Circa 2022, the safety and community policing is strong enough to weed out non-safe pilots. I know pilots are as old as 80 years old and have been flying for 40+ years without incidents.
More here: https://www.youtube.com/watch?v=pir3FAB4e3Q
This must have been in the early eighties. Maybe the gliders and/or training become better. But still quite a few people died. Since then more people do paragliding, which to me seems to be inherently safer.
I'll watch the rest of the video, but wanted to thank you for sharing it, and sharing your perspective. I am by no means risk averse, and long to fly one day, but after a few years of one dangerous sport, and considering joining friends in paragliding, I looked into the safety aspect and it seemed too risky (coming from one deadly sport, I felt like I needed a break, not another)
The primary determinant of failure is bad decision making, not skill, experience or equipment. In the absence of feedback, bad decisions look like good ones, because we get away with them, and that reinforces risk taking.
The author suggests that reflective practice is a key to improvement but most of us don't think over our actions - we just constantly "get away with" the outcomes.
One thing made me laugh;
"...respectable occupations of many hang glider pilots;
doctors, lawyers, computer programmers."
The social commentary hasn't dated so well :)A lot of people, when something bad happens, like breaking whatever a downtube is, or even a bone, chalk it up to "Life experience" and think it's an acceptable or necessary thing.
They say stuff like "Exceed your limits so you know your capabilities".
It's similar to the "Drop out of college for a 3 month backpacking trip, learn about life not math".
Wheras some people would instead say "I don't need to know my limits. I know where they aren't, and that's enough to avoid going near them".
Trouble is, those people don't hang glide in the first place!
I believe this gets you a nice safety bonus. At least you don't continue to shrink that error margin by telling yourself "so far so good". But you're still nowhere in the clear. Not making any mistakes is not humanly possible. And chance plays a role in dangerous sports no matter your skill or safety consciousness. So in the end you can only accept the risk or not.
Bonus related joke: A man slips and falls off a tall building. As he passes every floor he tells himself "so far so good".
> That sentence, “The most dangerous part of gliding is the trip to the glider field” is the dumbest, most ignorant saying that has found a home in our sport.
> The only thing they were doing up there was waiting for the start gate to open 1000 meters lower. And when it did open, they all dove down with air brakes open at 110 knots. The fact that the standard and 15 meter pilots squeezed the last 50 meters of height out of the thermal can only mean that something was wrong with their thinking.
> Everybody has to develop a safety strategy for himself. The simplest is to eliminate the risks that are completely unnecessary.
We tend to look at overall "risk of dying doing a sport" and fail to maintain awareness to identify these specific moments.
For example, our family wakesurfs on Lake Tahoe. My wife considers boating and wakesurfing pretty safe. However, in June the water temp is 53 degrees F. If our boat sinks 3 miles offshore and nobody sees it, life jackets will not save anyone. The boat sinking that fast is unlikely, but it is possible. I consider that an unacceptable unmitigated risk, and ask her to stay near shore when she drives.. yet she never does, and when i scold her she thinks im nagging and annoying.
While i'm not a pilot, i've been up with private pilots, taken hang gliding lessons, done tandem skydives, ride motorcycles, dirt bikes, ski a ton, backcountry ski..
..i don't consider any of these activities to be "safe" or "unsafe" overall.. i consider moments of low safety margin to be dangerous and to be understood, treated with extra care and mitigated or avoided as much as possible.
Maybe it is neither in just a function of increased urbanization or monoculture.
That said, it seems like there is a general decline in serious hobbyists in a lot of fields/ activities
If a pilot makes 50 safety-critical decisions over the course of a single flight, at a 99% success rate, I believe the actual chance of completing the flight without incident is given by 0.99^50, or ~60%. So, 2 out of 5 flights would result in an incident.
Of course, the reverse is true, if you know your actual rate of safety-critical incidents to be 1% of your flights, you can calculate how good your decision-making has been by 0.99^(1/50), or said another way: you've made the "safe" decision ~99.97% of the time.
A better model is perhaps how accurate do you need to be to avoid 10 tails in a row when flipping 10,000 coins every week for 30 years.
"Gann compiles a grim list: commercial pilots who perished during his flying career. They number more than 400."
https://www.cbc.ca/radio/ideas/ernest-gann-fate-of-the-hunte...
If breaking a downtube meant an automatic $1,000 fine and a year's suspension from flying that might help; but ultimately it's the honest prediction-then-self-assessment of decisions described in the article that's necessary.
The article talks about culture. It if it is OK to have a crash landing - and call it a normal landing because no harm to body, then more accidents are likely.
Imagine people crashed their car every day but “meh just needs a new bumper!”
I mean....have you ever been to Italty? Spain? Parts of france? I've definitely been to places where people bump into things with their cars pretty much every day and the only reaction was "meh, that's what bumpers are for". I mean those are not accidents, sure, but it shows a certain culture of recklessness.
People do crash their cars every day, and they do a lot worse than damage the bumper. 42,000 people died on US roads last year. It's the biggest and deadliest example of "normalization of deviance". American and Canadian transport planners simply refuse to follow international best practices for roadway safety.
I meant if it became normal for every person to have a minor crash every day because of the equivalent of “meh need to buy another $50 downtube!” and they consider it, well “a normal trip”
> “You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes.”
J B S Haldane
https://www.phys.ufl.edu/courses/phy3221/spring10/HaldaneRig...
Also, of course, many birds do die.