THE COVERS Articles & Editorials FEBRUARY 2001 • Volume 11 Number 2 
  
Photos by John Whitman
All across North America, from ocean to ocean, every blue splotch on the map and thousands more too small to record signal untapped adventure - bodies of water just waiting to be dived. This month's feature article "Diving North America: Endless Adventure, Extraordinary Variety" samples the many dive opportunities that await.
FEATURES
30 Diving North America: Endless Adventure, Extraordinary Variety
Since 1996 the authors have been traveling North America full time in a motor home. Coast to coast and beyond both borders, they've visited popular dive destinations, as well as some known only to the locals. They've swum with six-gill sharks, counted trout in a mountain river, and come face to face with a giant octopus. If you haven't considered dive travel within our continent, you should. It holds extraordinary diversity and countless opportunities for adventure.
By Lynn Laymon & Linda Lee Walden
44 Marine Reserves: Ensuring the Future Through Preservation
If you take a look at a detailed map of North America - particularly in the western regions - you'll notice a significant portion is set aside as some form of "protected area." Our conservation ethic and traditions are rightfully a source of pride. The problem is that our awareness, and in many cases even our desire to preserve, stops at the shoreline. The author examines the sometimes-controversial issue of no-take marine reserves.
By Alex Brylske
56 How Scientists Classify Marine Life...And Why: And What It All Means to You
This article is the first in an ongoing series about the classification of the marine animals you are likely to see when you dive. The series is designed to help you gain practical knowledge about the natural history and behaviors of the creatures that draw us into diving. You'll learn how to find the answers to questions like, "What is that?" and, "Are those animals closely related?"
By Marty Snyderman
COMMENTARY
8 Editorial: Home, Sweet Home By Alex Brylske
10 Buddy Lines: Shark Dive Controversy, Comments
18 Dive Observer: NAUI Celebrates 40th Anniversary and other news from the diving industry By Cathryn Castle
99 No Dumb Questions: Sea Creatures, Seizure Disorders, Equipment Concerns. A wide range of questions from our readers By Alex Brylske
DIVE EXPLORATION
107 Next Step: Wreck Penetration 101: Tips and Techniques for Overhead Environments. With this kind of diving, the word to remember is "wreckage."
The very name implies the potential for sharp objects, entanglements, weakened structures and loose debris.
By Joseph C. Dovala
115 What About: Green Flashes Demystified: The green flash - natural phenomenon or far-out fiction? By Amy Gulick
124 Weather and Waves: How Weather Works: Eight Guiding Principles
Understand how the weather works with the help of eight basic principles.
By Jack Williams
EVERY MONTH
67 Scuba Skills: Securing Your Gear: The Mark of a Responsible Diver. Tips to help you feel more secure By Lynn Laymon
71 Always Learning: Mixing Business with Diving: Next Trip, Plan a Scuba Break. How to mix business with diving pleasure By Mark Twombly
77 Instructor Tips: Beating the Bad Habit: Teaching Students to Avoid Hazardous Attitudes. Ways to help your students put scuba safety first By Robert N. Rossier
82 Dive Geo: Mexico's Riviera Maya: From Lost Civilization to Dive Destination By Barry and Ruth Guimbellot
93 Dive Traveler: The Air Up There: A Look at Life Inside the Big Cylinder. Is the air inside a commercial airliner cabin really safe, or should we be worried? By Robert N. Rossier
97 Passport: Dive travel incentives around the globe
Compiled by Cathryn Castle 
122 Dive Shop: New Technology Evident in Latest Gear Offerings
Compiled by Cathryn Castle
131 What's That?: Primitive and Porous: All About Sponges. Sponges have no organs, no brains, no systems. But they're no dummies. By Dee Scarr
139 Premiere Classifieds
141 Dive Training Classifieds
145 Dive Training Quiz . Test your knowledge of the information in this month's issue.  
146 Final Check: What It Looks Like When...Your Wet Suit Fits Properly. Without the right fit, you're out in the cold. By Linda Lee Walden