DivingInDepth.com’s Official Newsletter Q2 2008 – Volume 3

DivingingInDepth’s Monthly Newsletter – Diving In!!

Welcome to divingindepth.com’s July 2008 Newsletter! There has been substantial rewrite work on divingindepth.com over the last few months so that this site could relaunch with new features going forward!

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Wreck Diving

Scuba diving on shipwrecks has been around since people started diving beneath the sea. Shipwrecks offer a certain amount of mystery and lure and are invariably equated to sunken treasure. Diving on a sunken ship brings questions like: Where did the wreck come from? Did the people parish when this ship sank? What caused the wreck to sink? What’s inside the wreck? Whether the ship sank due to bad weather, navigational error, a wartime battle, or if it was sunk purposefully as an artificial reef, the lure of exploring a sunken ship is often intoxicating. Diving wrecks allows you to examine history and share an exhilarating experience with friends. Wrecks also are usually abundant with marine life of all kinds, and wrecks in cold, fresh water, such as the Great Lakes, are often well preserved.

Wreck Diving Overview

Wreck Diving Training

Wreck Diving Gear Guide

Wreck Diving Wreck Guide

Shipwreck Regulations and Legislation

Wreck Dive Trip Reports

Wreck Diving Photo Gallery

Wreck Diving Articles

Mixed Gas Overview

Mixed gas is generally classified as a gas mixture that contains helium in addition to other gasses, as apposed to air, which contains 21% oxygen and 79% nitrogen and nitrox, which are oxygen mixtures of greater than 21% and the balance being nitrogen. There are two forms of mixed gas that divers use primarily today: trimix and heliox. Trimix is a combination of helium, nitrogen, and oxygen, and heliox is a combination of helium and oxygen only. Mixed gas is used to eliminate nitrogen narcosis, to reduce the chances of getting oxygen toxicity, and to reduce decompression requirements.

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Exploration at Twin Dees Spring

Weeki Wachee Karst Project – Where Few Men Want to Go
by Jeff Petersen

The Beginning

What started as surveying and water sample collecting quickly turned into some of the most logistically demanding cave diving exploration in Florida. Initially, David Miner and I were hired by the South West Florida Water Management District (SWFWMD) to generate an accurate survey of Twin Dees Spring and Weeki Wachee Springs for inclusion in their geophysical study of the area. Weeki Wachee and Twin Dees (which is approximately 3,000 feet SW of Weeki Wachee) are located in coastal Hernando County southeast of Eagle’s Nest and about 2-½ miles west of Diepolder.

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Advanced Training

Most recreational wreck dives involve external surveys, however, limited penetrations are also considered recreational dives and are defined as involving no penetrations beyond the natural light zone, no deeper than 130 feet, and not involving stage-decompression. This type of training is designed to expose you to additional, in-depth training for the purpose of pursuing penetration wreck diving.

Photo: Steve May

An advanced wreck diving course is designed to provide you additional training, skills, and experience in planning, organization, procedures, techniques, problems, hazards and excitement of penetration wreck diving within excepted recreational diving limits. Advanced wreck diving training involves taking a course from a training agency such as SDI/TDI, NAUI, PADI, or IANTD.