GlennG‭

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 bes...

posted 7y ago by GlennG‭

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 ...

posted 7y ago by GlennG‭

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?); wher...

posted 7y ago by GlennG‭  ·  last activity 7y ago by System‭

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...

posted 7y ago by GlennG‭

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 d...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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...

posted 6y ago by GlennG‭

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 dr...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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. T...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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 Medit...

2 answers  ·  posted 6y ago by GlennG‭  ·  last activity 5y ago by System‭

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 ...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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 ...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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). Th...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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 ha...

1 answer  ·  posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭

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...

posted 6y ago by GlennG‭  ·  last activity 6y ago by System‭