Hot answers tagged

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 ...


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 ...


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

From the Marine Department: please note the question is describing a power-driven heading towards a vessel at anchor but not a vessel under way and showing a port side light. In the picture, the upper white light is the forward anchor light whilst the lower white light is the anchor light at the stern of the vessel. The red light at the middle is an all ...


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 ...


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

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

... 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

One locking carabiner might avoid some failure modes which apply to two quickdraws, but, as others have noted, it sacrifices redundancy. If you are concerned that two quickdraws might fail, you may make a couple "locking draws" specifically for anchors. Just attach small locking carabiners to a dogbone. That's what I have made for myself, mostly ...


3

It is a good practice to backup a tope rope system, especially considering that There is only one anchor at the tope and no intermediate quickdraws Climbing far below, a visual check can be difficult Any sling rubbing on rock may be damaged pretty fast (mainly a problem on high-friction rock and around edges) Top rope climbing is often done by beginners ...


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 ...


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 ...


2

Both .38 Special and .357 Magnum are calibers specified by SAAMI. If you have a gun with no indication of its caliber and no means of verifying its compliance with SAAMI specifications then don't expect it to safely fire SAAMI-spec cartridges. If a SAAMI cartridge appears to fit it and you want to work up a load then realize that you are engaging in proof ...


2

A simple, free solution here that should cover the bases. Create a WhatsApp group with some people that you'd trust enough to keep track of it. Post in there when you're planning/leaving for a trip, your expected return date, and how often you'll "check-in". Install the What Three Words app onto your phone and periodically share your location (and ...


2

To build upon a previous answer, I suggest you and your son get Skin Diving certification from a diver course. This would give you training to answer your own question! For example NAUI offers a course that is described as: Imagine floating on a clear sea of liquid watching fishes, crustaceans, corals - everything from dolphins to dugongs face-to-face. If ...


1

Many years ago, I was in a similar situation. When I returned to civilization I went to see a medical doctor. If I recall correctly, the doctor ordered one or two tests in which I was required to collect a small amount of my stool and place it in a cup for analysis. My memory of the experience has faded, but I think the cup was filled with some sort of ...


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