THE COVERS
Articles & Editorials
September 2009 - Volume 19 Number 9
    
PHOTOS BY Barry & Ruth Guimbellot
The moon has a heavy influence on the underwater world, from waves that meet the shore to the wanderings of marine creatures in the deep. This month’s cover feature, “The Pull of the Moon: How Lunar Cycles Affect the Underwater World,” explains how and why.
FEATURES
20
The Pull of the Moon:
How Lunar Cycles Affect the Underwater World
In addition to gravitational and tidal effects that produce currents and create waves, the moon also plays an important role in the life cycle of marine organisms. The author explains how the moon influences the underwater world — and how it ultimately affects our dive plans, too.
By Robert N. Rossier
30
In From the Cold:
What Divers Need to Know About
Thermal Stress and Hypothermia
Even in tropical waters, divers rarely, if ever, encounter conditions in which heat doesn’t drain from our bodies. Thermal stress is a fact of life for all divers on all dives, so a full understanding of how and what happens when divers get cold is about as important as remembering not to hold your breath.
By Alex Brylske
42
What Every Diver Should Know
About Emergency Transport
Injuries and illnesses while on a dive trip that require emergency evacuation are rare, however, they do occur. Would you know where to turn for answers to these and a million other questions that suddenly become top priority when an unexpected medical emergency arises?
By Linda Lee Walden
COMMENTARY
8
Editorial: Lunacy
By Alex Brylske
10
Buddy Lines: Dry Suit Buoyancy Advice Questioned
 
12
Dive Observer: Florida Keys Gears Up for Annual Coral Spawn
By Gene Gentrup
80
No Dumb Questions: Diving After
Heart Surgery, Deco Stop Concerns, More on Bounce Diving
Questions from our readers
By Alex Brylske
DIVE EXPLORATION
64
Global Dive Exploration Map
A geographical guide to great dive destinations across the globe
 
66
Dive Geo: Mabul, Kapalai and Sipadan:
Malaysia’s Diving Jewels
Up-close diving, far away
By Marty Snyderman
73
Training Site: Beaver Lake, Arkansas:
Natural Diving in the ‘Natural’ State
Good viz, great amenities
By Linda Lee Walden
77
Passport:
Dive travel deals from all over
Compiled by
Gene Gentrup
78
Diving USA
Dive travel opportunities across America
 
EVERY MONTH
53
Scuba Skills: The Surf Zone:
Tips for Entering Safely
It takes skill and timing
By Lynn Laymon
57
Instructor Tips: Questionable Judgment:
Teaching Your Students to Speak Up
When Things Get Iffy
How to help them find their voice
By Greg Laslo
61
Always Learning: More Like Marvin:
What I Learned in a Hawaiian Elementary School
We all learn when we share
By Marty Snyderman
84
Dive Shop
Compiled by
Gene Gentrup
86
What’s That?: Masters of the Sneak Attack:
Lizardfishes, Flatheads and Frogfishes
They prefer to go unnoticed
By Marty Snyderman
91
Premier Classifieds
 
92
Behind the Lens:
Preparing for Serendipity
It pays off, sometimes
By Marty Snyderman
93
Dive Training Classifieds
 
97
Dive Training Quiz
Test your knowledge of the information in this month's issue
 
98
Final Check: What It Looks Like When…
You Follow the Rules of Rinse Tank Etiquette
Avoid dubious dunking
By Lynn Laymon