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46

This is not a freediving answer!!! Freediving is not for 8-yr old kids. This is also not a scuba diving answer, this answer is about about casual, low-intensity, snorkeling, mostly on the surface, with shallow dives (I'd encourage him not to go beyond 4m myself). The list is a little bit more daunting than the actual risks. Don't dive deep, know how to ...


37

I am almost certain that you will be safe. Permethrin is not particularly toxic to humans, and exposures of notably higher concentrations than what you used for the clothing treatment have been found to not be a significant issue. In fact, there are treatments for head lice using 1% Permethrin, applied directly to the scalp, so I wouldn't worry too much ...


23

An existing answer makes a key point, but it's rather hidden: make sure he doesn't hyperventilate before diving. Hyperventilating reduces CO₂ in the blood, and it's the CO₂ buildup that leads to the urge to breathe. Suppressing that causes passing out (Wikipedia). This is tempting because it increases dive time, but is dangerous. The risks are well ...


20

The best thing you can do to both ward off illness, and catch any illness so it can be treated early, is to schedule an appointment with your doctor, soon. When you request the appointment, make sure you mention drinking untreated creek water as the reason for the appointment. That will give your doctor time to look up references to the appropriate ...


18

I am a spearfisher who dives regularly beyond 20m. I lost a friend who blacked out freediving (40m) alone and am fairly educated on the matter. As mentioned previously, hyperventilation is the main cause for underwater blackouts. I am writing "blackout", because one does not drown directly. Drowning is a consequence of blacking out. Under sustained ...


12

Clipping a carabiner into the belay loop instead of tieing in is a fast way to get people on the rope. It can be useful when there is a large group of people that want to climb but are not experienced to tie in themselfes, e.g. marketing events at the climbing gym. However, it comes with some drawbacks which is why it is not recommended for general use by ...


10

drugs.com notes the Usual Adult Dose for Scabies is a Permethrin topical 5% cream, applied by thorough massage into the skin. 30 grams. That's essentially 1,5 grams pure permethrin applied to the skin directly. I don't recommend doing so unless it's required, but if your spray is 0,5% and you've applied twice what is recommended, it would seem you're still ...


10

In theory yes that is something you can do. I would recommend using an oval 3 way locking carabiner or two screwgates. Connecting the rope with a double figure eight is a good and safe option. But there are good reasons why it is usually not done: When you are lead climbing you have to untie the knot anyways since you have to pull through the rope. Further I ...


9

If you genuinely have no one who you can use as an SAR contact you could purchase a either a GPS SPOT device or a PLB which can be used to emit an SOS signal that will be detected in an emergency even outside cellphone coverage areas. Remember your SAR contact doesn’t need to be a friend. They can be a work colleague or a neighbour. You don’t even need to ...


8

Make sure he's educated about equalisation and gas expansion/contraction under pressure. He should equalise ("pop") his ears several times while diving to such depths. He is probably already doing this, but perhaps you could introduce him to gentler or more reliable techniques. Not equalising is very painful and will damage the ears, he should be ...


4

Not a complete solution, but how about AllTrails lifeline feature: https://support.alltrails.com/hc/en-us/articles/360019246351-What-is-Lifeline- If you're overdue messages go out. Unfortunately, I don't believe it can be set to only send an emergency message, nor am I aware of any other such solution that only sends the overdue message.


4

While your question is possibly considered off-topic for this site, you raise some interesting points. First of all: Please seek professional medical help. A lack of energy and not leaving your apartment indicate that you might have depression. While I am neither a qualified medical professional nor a qualified mental health professional, I strongly suggest ...


4

You might as well ask "How long is a piece of string?" - everything depends on the local geology. There are thousands of quarries that have been developed for cragging. But there must be a great many more that will never be suitable. Initial research The rock in your picture doesn't look very promising, to be frank, so you might want to do some ...


4

Speaking as a parent of a child with whom I went swimming very often in that same age bracket: I did an ABC course and am very comfortable diving in regular indoor and outdoor pools/swimming lanes, and in shallow ocean. I was into underwater hockey mainly, and diving for distance, not depth. My kid did not do an ABC course; I did give her the opportunity to ...


4

Our modern default practices evolved from mountaineering, where the expectation was that you and your partner would tie in to opposite ends of the rope and stay that way all day without untying. In that context, tying the knots was a totally negligible portion of the total time spent climbing. I'm aware of two common use cases where people tie in with a ...


3

... what qualities ...? immediate availability to the user not liable to cause injury to the user - cold, sharp edges, hearing, lanyard strangulation etc. health of the user - lung capacity, breath strength environmental issues - wind, mist, fog affecting audibility damage to the device the device being disabled through moisture, water ingress usability by ...


3

At the time, yes. Don't eat anything when you drink the water. This will reduce the likelihood and severity of food poisoning. The ingested water will have its pH rapidly reduced which will kill some pathogens. if you have food in the stomach as well this will happen more slowly. Also, a bolus of food is more likely to protect and transport pathogens. ...


3

For what it's worth, I had a previously scheduled appointment with my primary-care physician a few days after the incident. One of his interests/specialties is remote and wilderness medicine. His advice was that in the absence of symptoms there is nothing to do but wait. There is no way to preempt symptomatic infection after exposure, but if symptoms develop ...


3

I have been flying paragliders for more than 20 years, I am an instructor in France during the peak season, and in the winter I would go to Mexico, where I organize paragliding tours for visiting pilots/students. The same way you must walk before you can run, you need to take it easy. Actually tree-landing should not be considered as an option, though it may ...


3

Before sharing what I have been doing in many outings, I will remind anyone reading that the most widely accepted set up follows the Petzl recommendations: and I certainly would suggest anyone to pay attention to them. I am getting more and more comfortable using two strands of a static rope, tied at the anchor via two independent locking biners and a ...


3

Good question and good answer by @Qudit. I'd just like to add my thoughts on this based on own experience. First of all, for info, I do TR solo for several years, using a Microcender as main device and Microtraxion as backup. Mostly with 2 ropes, but sometimes one rope only. Different story, but for self belay while leading, I use similar setup as rappel in ...


3

Much depends on how frequently you use prusiks. Back in college when i was caving a lot, we used prusiks tied in 1/4" Plymouth Goldline using a 9/16" chunk of goldline as our ascent/descent line. I never had an issue, nor did anyone in our group. For those of you unfamiliar, Goldline was a very hard lay stranded rope. As stranded rope, it was ...


3

I do this. We have some giant locking carabiners rated well above 20kn that we use only for tie-ins and belay endpoints. The point of using these giant carabiners is the energy absorption; their large size allows them to absorb far more thermal energy than a normal sized one would. This becomes important when rappelling. This used to be important when ...


2

We use an InReach (https://discover.garmin.com/en-US/inreach/personal/) to send a daily check-in message to a small group of trusted friends/family. We have given them a-priori instructions on what to do when they don't get the message (how long to wait, who to contact etc.) Note that InReach does not need a phone signal, has a 1+ month battery life and ...


2

No for quality guns, possible for poor quality ones. Here's a video of a gun spontaneously firing when shaken. Notice in the 2nd half of the video that it can fire even with the safety on. Basically don't buy crappy guns such as Taurus pistols.


2

The question is a bit old, so I believe this equipment got more common in the later years. To keep yourself safe, you can use a stick clip, the most common model now being Beta Stick. They are typically used to clip the first bolt, but you can attach them to your harness, then find a safe position before the runout section (probably put yourself on safety at ...


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