Flamboyant Cuttlefish footage from Malaysia

The flamboyant cuttlefish is pretty small - about the length of a hand - but its intense colours and spearing proboscis make it utterly mesmerising. This vid does a great job of showing off its colours, even more so...

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Underwater photography tips from New York Institute of Photography

The best time to take underwater photos is usually mid-day because the sun is overhead and will illuminate underwater subjects clearly. Rookie underwater photographers are often surprised how quickly light and color get lost as you plunge just a...

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Advanced Open Water courses - are they worth it?

Although it is quite possible to do deeper and more advance level dives as one gets more experience in diving without taking another course, it is much more ideal to introduce yourself to more difficult dives with an instructor. Deep...

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PADI Scuba Diver course comes under fire

Anyone familiar with the diving industry is aware that PADI, the US-based diver certification agency, is often criticized for introducing programs based more on marketing objectives than educational ones. Some of that criticism is justified; much of it is nothing...

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GPS coordinates explained

Without a doubt, the most commonly asked question I get from divers has to do with reading and using GPS coordinates. This is not surprising since a GPS coordinate can be represented in so many different ways. Books, magazines, and...

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Dive Site Directory reviewed

If you’re on the hunt for some dive site information, then you might want to check out the aptly named dive site directory. Begun by Clare and Matthew Slightam as a free source of reference for the diving community, it’s...

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Canon Underwater Photography Guide

Canon have an Underwater Photography Guide which shows reasons for using a digital camera over a film camera, Marine Techniques, Pre-Dive Preparations, Understanding White Balance, taking Macro Shots and Wide Angle Shots, Panorama Shots about Movies, Maintenance on the Boat...

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Titanium regulators and nitrox safety issue?

My local store has just told me that it has been determined within the last year that titanium regs are bad to use with all mixes of nitrox. He claims that the titanium is a fire hazard and that most...

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Advantages of trimix for recreational diving?

I just finished up my gas blender class today and the instructor mentioned something about a recreational trimix class offered through naui. Didn't get a chance to go into it further with the instructor due to time, so I was...

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Fish Watching for Beginners

People dive for different reasons and one of the main reasons is to watch the fish. But, many divers show little interest in the beginning, because they think they have to memorize a bunch of confusing scientific names. Also, there...

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Underwater photographers = crap divers?

Getting a good photo is no excuse for damaging the environment. This is where we underwater photographers are most vulnerable to criticism. Adding a camera and strobe will affect buoyancy, and once the eye is glued to the viewfinder,...

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Narwhal horn mystery solved

The narwhal has a tooth, or tusk, which emerges from the left side of the upper jaw and is an evolutionary mystery that defies many of the known principles of mammalian teeth. The tooth's unique spiral, the degree of its...

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Thinking about scuba diving with a rebreather?

An overview of rebreather world, an internet forum focussed on rebreather diving, but in addition to the usual forum type content, rebreather world also has plenty of articles and resources for scuba divers interested in rebreathers. Via ScubaGeek...

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PADI, NAUI, SSI, or other?

I found myself recently thinking about what is probably one of the most commonly asked questions by those considering diving. That is, "what is the best SCUBA certification agency?" By far, the most common agency in the US, based on...

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Maximum depth discussions

Assuming that one has an an adequate gas supply, of the best possible gas (neox/heliox e.t.c) mixture, and assuming that they have a bit of a suicide wish, what would be the maximum possible depth one could descend to before...

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Coral planting project to save Singapore's reefs

Budding undersea colonies are being planted around Singapore in an effort to reforest some of the world's most silt-filled waters. Large-scale efforts here include transplanting small pieces of coral to degraded areas, where they will hopefully take root, and providing...

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Asthma and Diving

About the age of seven, I developed a pretty bad chesty cough which my GP diagnosed as asthma. He gave me an inhaler and told me to see a specialist. The first specialist I saw continued to treat me for...

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Charle’s Law

Charles’ Law states the relationship between temperature and volume of a gas at a constant pressure. T/V = k Where T is the temperature of the gas, V is the volume and k is a constant. In a nutshell,...

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Turbidity and Visibility

Turbidity is the term to describe the amount of particles in the water, affecting the visibility for divers. Green colored water is the worse visibility, and requires extra precautions to stay with your dive buddy, especially in drift diving....

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PADI Unveils Digital Underwater Photographer Specialty Course

PADI already offers an Underwater Photography specialty course, but beginning in 2006, PADI will be offering a two-part Digital Underwater Photographer specialty, covering such topics as white balancing, working with color filters, using histograms, image resolution, and organizing and archiving...

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Learning To Cave Dive in Florida: A Trip Report

Andy Carrol writes for Scuba Geek, a great new scuba diving blog that I’ll be visiting often. Andy recently visited High Springs, Florida, which he describes as “cave country, the headquarters of GUE, Extreme Exposure and Halcyon, [and] where DIR...

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