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Alert Diver

Alert Diver is the dive industry’s leading publication. Featuring DAN’s core content of dive safety, research, education and medical information, each issue is a must-read reference, archived and shared by passionate scuba enthusiasts. In addition, Alert Diver showcases fascinating dive destinations and marine environmental topics through images from the world’s greatest underwater photographers and stories from the most experienced and eloquent dive journalists in the business.

Contents | Third/Fourth Quarter 2020 | Features

ON THE COVER: WINNER - OCEAN SUNFISH
Nusa Lembongan, Indonesia
By Yung-sen Wu

One of the world’s heaviest bony fish, the ocean sunfish (Mola mola) has developed some unique symbiotic relationships with a variety of species, from seagulls to wrasses. The sunfish will signal when they need a cleaning of their scaleless body, which is covered with thick, elastic skin. Their size and slow movements allow them to sometimes be a habitat for more than 40 species on a single fish. While sunfish often hunt at depths between 600 and 2,000 feet, I photographed this one at 121 feet.

Sony a7R III, FE 12-24mm f/4 G lens at 24mm, 1/100 sec, f/8, ISO 640, Seacam Seaflash 150D strobes (2), Seacam housing FB @acewuuwp

Page 64. Blessed Bonaire
GETTING BETTER WITH AGE
Text and photos by Stephen Frink
With a passion for preservation, an ideal location, colourful sponges, healthy corals and 86 named dive sites, Bonaire truly earns its reputation as a diver’s paradise.

Page 70. Solomons Sojourn
Text and photos by Tanya G. Burnett
Divers can embrace the present while exploring the past in the Solomon Islands, with its mix of natural and historical dive sites, including an abundance of World War II wreckage.

Page 76. Oil and Particulates
WHAT ARE SAFE LEVELS IN OUR BREATHING AIR AT DEPTH?
By Francois Burman, Pr.Eng., M.Sc.
Following best practices to limit contaminants in compressed gases can reduce the risk of fires and respiratory issues that could result from oil and particulates in divers’ breathing air.

Page 80. 2020 Ocean Views Photo Contest
With many divers sidelined because of the coronavirus pandemic, the winning images from the Ocean Views photo contest inspire a longing for new adventures in dive travel.

Alert Diver Q2 2020

Alert Diver Q1 2020

Alert Diver Q4 2019

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