John is a Virginia native and new to both Florida and International training. John worked as an instructor for 4 years at a small mountain dive shop and shared his love of diving the community. He now projects this passion by assisting dive centers, processing certifications and answering questions in the Membership Services and Training Department on the phones and emails. In his spare time John loves diving in the North Florida caves and Florida Keys shipwrecks.
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John BentleyProduct DevelopmentContributing Author

Overhead environments – Cave vs. Advanced Wreck
While it might seem obvious, do you know the differences and similarities of cave diving and advanced wreck diving? To call them the same but different would be an understatement. Both very worth the training to experience their unique wonders.
August 7, 2018/by Brittany Bozik
New eLearning Signup Process
We've revamped our eLearning sign up process to make it easier on all parties involved and to help everyone out as we transition into this new process we made some videos to walk you through our new sign-up process.
February 21, 2018/by Brittany Bozik
KISS Rebreather Course: A Student and Instructor Perspective
Ready to jump into rebreather diving? Not sure what to expect? Are you sure you're doing it for the right reasons? Take a look into this unique perspective of a student and instructor going through a KISS rebreather course. It might just make you think a little longer about making sure you're REALLY ready to enter the world of rebreather diving.
February 6, 2018/by Greg Toscano
Can you Climb a Boat Ladder in Sidemount?
Sidemount is mainstream as a gear configuration and it works well for lots of people. While it originated in cave sites, it’s a common sight on dive boats, local quarries, and shore sites in present day. For good reasons, some people are hesitant about sidemount boat diving. This is due to two main reasons, both involving the wide surface profile of sidemount.
October 11, 2017/by Greg Toscano
I Want To Be A Tech Diver. Where Do I Start?
Television, magazines, stories from a friend – it doesn’t matter the source, exploring the underwater world and escaping the surface is enticing and exciting. So how do we keep exploring? What exactly is technical diving?
September 13, 2017/by Greg Toscano
Got bad Buoyancy? Who cares?
But really why does it matter SO much?! You see so many divers on social media kneeling on the bottom, posing for photos without any regard to what surrounds them and what's under them for that matter. Buoyancy isn't just another skill to learn in diving it's THE skill you need to master.
June 7, 2017/by brittany hadfield
That’s Wrong: Misconceptions on Overhead Diving
Crusing the internet for cave diving info is an interesting situation because like anything else you're finding the info could be really awesome or uh... well not so awesome. This is where trouble begins, divers reading misinformation and not confirming it's accuracy. We crusied the fourms and are tackling to misconceptions in overhead diving.
May 9, 2017/by brittany hadfield
That’s Wrong: Technical Diving Misconceptions
Have you been on the diving forums lately? Heard a few interesting theories? While sometimes this is a good place to start for basic questions, it can also lead you down a very wrong plan to misinformation. We cruised the forums and picked out a few things we saw and now we're setting the record straight.
April 10, 2017/by brittany hadfield
Battery Technology in Diving
Do you know the different types of batteries we use in diving? Do you know why they're different? Their uses? We're telling you all of the above and more!
March 6, 2017/by brittany hadfield
LED Lighting in Technical Diving
Which lights are right for you? And what's the difference between them? We're breaking it down for you, types of LEDs what they're used for, how they came about and more.
February 2, 2017/by brittany hadfield
Emergency Procedures: Separated Mouthpiece
The separation of this mouthpiece can be a scary and dangerous experience but is prevented and managed easily.
January 26, 2017/by brittany hadfield
Solo Diving in a Technical World
Being a solo diver, whether diving alone or in a buddy pair, offers many benefits to both safety and recreation but does inherit a higher risk factor when applied in the wrong scenario.
January 4, 2017/by SDI/TDI/ERDI
Learning the Scuba Language
The best way to understand this communication is simple; practice and communication.
October 31, 2016/by SDI/TDI/ERDI
What Do I Need For My First Night Dive?
Sign up for a Night and limited visibility course at your local SDI dive center soon to take a dive on the dark side.
September 26, 2016/by SDI/TDI/ERDIWant to be a contributor?
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