Activity for GlennG‭

Type	On...	Excerpt	Status	Date
Answer	—	A: What are possible ways to drink on a long scuba dive? For very long dives in cold water, such as deep caves, an underwater habitat is used during decompression. Effectively these are like lift bags where you can put your head above the water to eat, drink, talk, etc. Larger habitats enable one to climb out of the water whilst still under pressure, ... (more)	—	over 5 years ago
Question	—	Where in the world do you need a cave diving certification to dive? Firstly a preface: all training's good and especially overhead training where the environment's so unforgiving. Plus lots of practice. Where around the world are dive locations where you must have the cave diving certifications to dive? For example in Mexico or Florida. What level are these re... (more)	—	over 5 years ago
Answer	—	A: How to transport diving knives / shears? Knives come in all shapes and sizes. Knives are also not optimal for cutting your way out of a net or fishing line: use a line cutter such as the Trilobite Line Cutter (others are available). These contain blades which are shielded and won't be considered a "weapon" except for hand luggage. If yo... (more)	—	over 5 years ago
Answer	—	A: Good places to go potholing in the UK I recommend the Mendips with an organised group. Could do a morning session in the dry Goatchurch Cavern and an afternoon session in the wet but superb Swildon's Hole. Around there there's loads of other places including Sidcot Swallet with the well-named Lobster Pot (easy to go in and a struggle t... (more)	—	over 5 years ago
Answer	—	A: Would a gunshot echo in a cave? Would a gunshot echo in a cave... It depends on the cave. To echo a sound wave needs a smooth surface to reflect off of. Most caves aren't giant smooth caverns but are relatively convoluted or tight passages with random shapes to the walls, ceilings and floors which will randomly reflect the sou... (more)	—	over 5 years ago
Answer	—	A: No Stop Limit for Recreational Scuba Diving Answering the specific question: why does a shorter but deeper dive leave a lower residual nitrogen limit than a longer shallower dive. Common gas absorption decompression models such as Buhlmann work on the principle of several gas "compartments" which absorb inert gasses (e.g. nitrogen, helium) at... (more)	—	over 5 years ago
Question	—	Is there anywhere to dive in the Mediterranean that's like the Red Sea? Have heard great things about diving in the Red Sea. However, Egypt's not the most stable and safe place to visit. What are the alternative locations for diving in the European side of the Mediterranean where there's similar diving experience? Thinking pretty fish, abundant life and good visib... (more)	—	over 5 years ago
Answer	—	A: No Stop Limit for Recreational Scuba Diving As a rough rule of thumb, a dive at 45 metres is a ratio of 1:1 where every minute at that depth requires one minute of decompression stops. Therefore every dive to 45 metres is a decompression dive, which by definition is a technical dive and not a recreational dive, as covered by the RDP (Recre... (more)	—	almost 6 years ago
Answer	—	A: What are possible ways to drink on a long scuba dive? Dehydration is a very bad thing when diving and can lead to DCS (Decompression Sickness) as the blood thickens. One of the most important scuba devices is a Pee Valve which allows you to urinate under water when wearing a drysuit. Most importantly it means that you don't deliberately avoid drinki... (more)	—	almost 6 years ago
Answer	—	A: Can I reuse the PADI Scuba Diving e-training for another person? PADI wouldn't allow you to share the material; almost certainly there's a non-sharing clause in the licence. However this is moot as the background reading material is only part of the course. There's classroom training using PADI's presentation materials and videos, above-water training by your ... (more)	—	almost 6 years ago
Answer	—	A: Special equipment for Nitrox Dive? The main 'special equipment' is to have an O2 analyser and use it. You should also have waterproof tape (Gaffa tape) and marker pen. Cylinders should be O2 cleaned according to local regulations (every 15 months in the UK). Regulators don't need to be specialist O2-compatible devices (for example ... (more)	—	almost 6 years ago
Answer	—	A: Scuba diving right after passing certification A common way of getting experience is to join a local club and go diving. Of course this depends on where 'home' is, but the only way to get experience is to get under water and go diving. Even diving in pools, lakes, quarries and the like will mean you get to sort out your core skills: buoyancy, ... (more)	—	almost 6 years ago
Answer	—	A: How to avoid getting cold when diving? Use a drysuit. These insulate, are far warmer than a wetsuit and are an additional source of buoyancy. Two varieties, neoprene & 'membrane'. Typically neoprene is cheaper so your first drysuit is neoprene then you move on to membrane. To cut to the chase: membrane means there's little ins... (more)	—	about 6 years ago
Answer	—	A: Does a diver's breath rate become slower when going deeper? The urge to breathe is driven by the CO2 content which is still being produced at the same rate at depth as on the surface. We metabolise the oxygen and produce CO2 as a by-product. In fact at the surface we breathe out surplus oxygen, hence one can perform mouth-to-mouth resuscitation. 'Skip bre... (more)	—	almost 7 years ago
Answer	—	A: I've been out of the water for a little over a year; what should I focus on refreshing before I dive again? Skim-read the books again, answer some of the review questions again. This will remind you of the theory. However, books are no substitute for getting wet and running through the skills. All dive shops / schools will be glad to take you on a refresher dive in a closed environment to go over the... (more)	—	almost 7 years ago
Answer	—	A: What are the pros and cons of both a DIN and a yoke valve for a scuba-diving regulator? DIN is always a better connector than the older and inferior yoke format which for some reason is far more prevalent in the US and surrounding countries. There are several drawbacks to the yoke: the o-ring is on the cylinder and is very frequently damaged the o-ring can be damaged when your kit is... (more)	—	about 7 years ago
Answer	—	A: How can I stop my scuba mask from pulling away from my face after equalizing? You should be able to breathe out through your nose and have no effect on the seating of the mask -- that's what rebreather divers do all the time. If you can't do this, it has to be a problem of fit. Masks are extremely personal bits of kit that need to be tried on before you buy. Typically the ... (more)	—	about 7 years ago
Answer	—	A: Is it worth getting a divemaster certification if I don't plan to work as a professional dive master? How about leaving the PADI fold and moving on to other styles of diving, for example technical diving: where you can learn to do much longer dives with decompression (an hour at 30 metres?); where you can use alternative gases - Trimix - and dive deeper; where you can investigate the amazing under... (more)	—	about 7 years ago
Answer	—	A: What exercises can you do before Scuba Diving to improve your air consumption? Practice and remaining calm underwater seems to be the key to reducing your gas consumption. Most new divers consume lots of gas due to the unfamiliarity of being underwater, novice skills, and the ubiquitous overweighting. After a while, you learn to control your buoyancy and get your weighting... (more)	—	about 7 years ago
Answer	—	A: How many lumens for a diving torch? Lumens is the amount of light emitted from your torch. If the same amount light is spread in a tight beam, say 6 degrees, it will appear much brighter than the same amount of light spread over a wider beam, e.g. a 12 degree beam is about 4 times the area than a 6 degree beam, so will appear to be... (more)	—	about 7 years ago
Answer	—	A: If my depth varies +- 2m when breathing in and out, what's going wrong? Moving vertically +-2m is a lot. An awful lot. It shouldn't be more than a few cms. This sounds like there's something else going on. Good buoyancy requires lots of practice to master. The best place to practice is 15cm above a platform at around 6 metres. You should be still; fins not moving;... (more)	—	about 7 years ago
Answer	—	A: When taking a Go Pro scuba diving, how would you mount it? GoPros have quite short battery life and it's not possible to change the battery under water. Therefore you'll need to turn it on and off. The best place to hold a GoPro is in the hand as you can frame the shot and hold it steady. Attaching it to a helmet / head strap results in lots of poor video... (more)	—	about 7 years ago
Answer	—	A: How to dry a BCD (Buoyancy Control Device) Inflate the BCD (Buoyancy Control Device) and empty out any water from the bladder. Generally turn it over so the elephant's trunk is lowest and press the deflate button. Then hang it up over the bath / shower. Most of the BCD materials aren't that porous, so there's not that much water caught up... (more)	—	about 7 years ago
Answer	—	A: What locations to scuba dive inland in the UK? In the south of England, the main three centres are Vobster Quay in Summerset: lots of attractions to play on and a tunnel to swim though (at an angle, so a good buoyancy test). Max depth circa 35m. Vis is good in the winter, less so in the summer when the schools are busy. Has a burger van... (more)	—	over 7 years ago
Answer	—	A: What wetsuit thickness is recommended in which temperatures for diving? It's a question of the right tool for the job. For diving in temperatures below 14 degrees Celcius, a drysuit is best. When diving below 7 degrees a wetsuit really isn't the right tool for the job and is dangerous as you'll be extremely cold and will suffer on the surface. Even diving a 7mm wetsu... (more)	—	over 7 years ago