Giant Blue Sinkhole Discovered In Great Barrier Reef

A giant blue hole in Australia’s Great Barrier Reef has finally been explored by a team of divers and has shown it is home to a healthy coral population.

The hole, which could be older than the famous Belize blue hole, had previously been described by geologists and is located more than 125 miles (200km) from Daydream Island off the coast of north east Australia.

Marine biologist Johnny Gaskell, who posted a breathtaking image of the blue hole on Instagram, explored the site with fellow divers to a depth of 20m (65ft), reporting healthy coral colonies despite coral bleaching in the area.

Yesterday's Blue Hole mission in the Great Barrier Reef. This Blue Hole has previously been explored and documented by geologists who suggested it could be even older than the famous Great Blue Hole, in Belize. It's location is in one of the least explored parts Great Barrier Reef, over 200km from our home @daydreamislandresort . To get there we had to travel overnight for 10 hours and time the tides perfectly… Was well worth it! Inside the walls was similar to the site we explored a few weeks back, but this hole was deeper and almost perfectly circular. We dived down to just over 20m yesterday, before hitting bare sediment, that slowly sloped towards the centre. Again it was great to see big healthy coral colonies. Stay tuned for video footage of the coral within…

A post shared by Marine Bio | UW Photographer (@johnny_gaskell) on

According to Gaskell’s Instagram post, the dive took extensive preparation. He said: “This Blue Hole has previously been explored and documented by geologists who suggested it could be even older than the famous Great Blue Hole, in Belize.

“Its location is in one of the least explored parts Great Barrier Reef, over 200km from Daydream Island.

“To get there we had to travel overnight for 10 hours and time the tides perfectly. [It] was well worth it! We dived down to just over 20m, before hitting bare sediment, that slowly sloped towards the centre.

“It was great to see big healthy coral colonies. Stay tuned for video footage of the coral within,” he added.

@jaketarren
#askmark Heyo!  Been learning about sidemount and I'm having a hard time finding a clear example of how to rig the tanks.  I know it'll be covered in the training, but I need to know what to get before I take the class, there isn't a good sidemount shop near me.

Can you show how sidemount tanks and deco/stage tanks are rigged please?

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@jaketarren
#askmark Heyo! Been learning about sidemount and I'm having a hard time finding a clear example of how to rig the tanks. I know it'll be covered in the training, but I need to know what to get before I take the class, there isn't a good sidemount shop near me.

Can you show how sidemount tanks and deco/stage tanks are rigged please?

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▶️ https://www.youtube.com/watch?v=F7MfATRd5Os
▶️ https://www.youtube.com/watch?v=_Y6wIOKde48

=================================

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How Do You Rig a Sidemount Cylinder?

@martink72
#askmark How do I attach a flashing light to my twin or single cylinder so that my buddy can see/find me even in poor visibility or at night? The typical lanyard on these things always let the light fall downwards and obscure it.
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Welcome to Scuba Diver Magazine! We’re passionate about everything related to the underwater world. As a free distribution magazine in Europe, ANZ, and North America, we bring you the latest in scuba diving, from epic dive travel destinations and honest gear reviews to expert advice, news, and inspiring underwater stories.

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@martink72
#askmark How do I attach a flashing light to my twin or single cylinder so that my buddy can see/find me even in poor visibility or at night? The typical lanyard on these things always let the light fall downwards and obscure it.
Please visit our website for more Scuba news, underwater photography, hints & advice, and travel reports: https://divernet.com/

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=================================

✅ About Scuba Diver Magazine.

Welcome to Scuba Diver Magazine! We’re passionate about everything related to the underwater world. As a free distribution magazine in Europe, ANZ, and North America, we bring you the latest in scuba diving, from epic dive travel destinations and honest gear reviews to expert advice, news, and inspiring underwater stories.

Whether you’re a seasoned diver or just starting your underwater journey, our content is designed to keep you informed, inspired, and ready for your next dive. Get in, explore, and stay connected to the world of scuba diving with us! Join us and never miss an adventure!

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How Can I Attach a Flashing Light Strobe To Myself So My Buddy Can See Me? #askmark #scubadiving

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