Professional Association of Diving Instructors

European Underwater Federation

World Recreational Scuba Training Council

Confédération Mondiale des Activités Subaquatiques

Federação Portuguesa Actividades Subaquáticas

Câmara Municipal de Matosinhos

Divers Alert Network

DiveXpress / Ursuit

Diving.eu

Windguru

Suunto

Cressi sub

Emergency First Response

Comité Coordenador de Centros de Medicina Hiperbárica

Diving Medicine Online

Project AWARE

Shark Trust

The Coral Reef Alliance

Reef Environmental Education Foundation

The Ocean Conservancy

Euro Census of Marine Life

The Census of Marine Life

Hotspot Ecosystem Research on the Margins of European Seas

Shark Foundation

Shark Project

Earthdive

Scuba Women

Dive Girl

PADI Seal Team

PADI AWARE Kids

The Underwater Channel.TV

Planeta Sub

Dive Magazine

Current publishing corp.

Sport Diver

Diver Magazine

Underwater Journal

Skin Diver

Rodale's Scuba Diving Magazine

Advanced Diver Magazine

Wreck Diving Magazine

Undercurrent

Peixe Voador

Geotur

Escape Travel

Mergulho no Azul

Sensaciones.org

Porto XXI

112Buceo.com

Fórum de Mergulho

ELA - Estação Litoral da Aguda

Centro Nacional de Arqueologia Náutica e Subaquática

Instituto Hidrográfico

National Oceanic and Atmospheric Administration Diving Program

Uboat net

Mare Nostrum

ABC of Diving

Diving Index - Scuba Diving Directory

Fish Base

Wanna Dive

Nautilus Sub

The Scuba Spot

Diving Obsession

Lost Treasures of the Seven Seas

My Dive Book