On the basis of maximum depth, Crater Lake is the deepest lake in the United States, the second deepest in North America (after Great Slave Lake in Canada), and the ninth deepest lake in the world (Lake Baikal is the deepest).

Trimix is a breathing gas, consisting of oxygen, helium and nitrogen, and is often used in deep commercial diving and during the deep phase of dives carried out using technical diving techniques.

Scuba diving attracts many visitors to the island.

Since the incident the United Kingdom had changed its diving procedures.

The lake is deepest at this point.

This is the lake's deepest point.

Also, when you get down there, you find that the water is very, very clear.

There are a number of dive sites and a diving resort.

It is further defined as an activity that includes one or more of the following diving beyond 40 meters 130 feet, required stage decompression, diving in an overhead environment beyond 130 linear feet from the surface, accelerated stage decompression and or the use of multiple gas mixtures in a single dive.

The original octopus idea was conceived by cave diving pioneer Sheck Exley as a way for cave divers to share air while swimming single file in a narrow tunnel, but has now become the standard in recreational diving.

The region is rich in coral and has many diving sites.

And the problem, the limitation of diving with air is all those dots in your body all the nitrogen and all the oxygen.

Another possibility is to dive from the outside of the volcano through the channel into the caldera.

In this instance the specific form of identity theft is called dumpster diving .

Pure oxygen is mainly used to speed the shallow decompression stops at the end of a military, commercial, or technical dive and is only safe down to a depth of 6 meters (maximum operating depth) before oxygen toxicity sets in.

Bill Stone Exploring deep caves

No, the problems run deeper.

They're ideas about which people disagree in the deepest possible sense.

Indeed, relations with China are Japan's most profound problem.

So, to go deeper, most biologists have turned to submersibles.

And I remember coming up from one of these deep dives, and I had this fog, and the narcosis takes a little while to, you know, fade away.

There are plenty of coral dive sites and a wide variety of marine life.

Nothing beats a dip in the cool waters of Rio de Janeiro's world famous beaches on a hot Sunday morning.

Pterothrissus This genus is like Albula , except it is found in deeper waters.

We need helium, and the helium is what we really need to go deep.

There is no point in belaboring whose pain is greater or whose root cause is deeper.

I wish to join other delegations in sharing in the grief and expressing our deepest condolences.

Alright, closed circuit rebreather what is it about it that makes it different from scuba, and why is it better?

The deepest point in any lake in Finland is located in Päijänne ().

Among several hundred caves known in the Arabika Massif, fifteen have been explored deeper than 400 m and five deeper than 1,000 m (shown in Figure 1).

In technical diving, the diver may carry different equipment for different phases of the dive some breathing gas mixes may only be used at depth, such as trimix and others, such as pure oxygen, which only may be used during decompression stops in shallow water.

Recreation In Darwin Bay there is the possibility to either dive along the inner wall or go to the outer wall, which is less protected.

The Krubera Cave is the deepest known cave in the world.

Its depth is , making it the second deepest in the United States after Crater Lake ().

There are a few dive operators on the island offering manta ray dives and also shark feeding dives.

Now, the deeper you go underwater, the higher the pressure is.

But there is much more to it than that.

They're still new species because I had a video camera on this dive instead of my net, so they're still waiting down there for someone to go find them.

But it was our meetings with the ordinary people of Sudan that left the deepest impression.

The Clapeyron slope predicts a deeper discontinuity in cold regions and a shallower discontinuity in hot regions.

But it is within Venezuela itself that a Rosales government would make its most profound changes.

Dutch cocoa is slightly milder in taste, with a deeper and warmer colour than natural cocoa.

At the peak of activity earlier this year, the researchers lowered the drill an extra hundred feet deeper into the ice every day and another 365 years deeper into the past.

Regardless of developing countries growth prospects, there is a deeper question.

But we re also looking deeper and further ahead.