In January 2018, Barb Roy, our long-time associate editor and regular contributor, passed away after a long battle with illness. We celebrate her inspiring life and imagery in this memorial portfolio, highlighting some of the many beautiful and vivid underwater photographs Barb took during her frequent forays under the waves.

Do we really need to go underwater at the other end of the world (and its challenges)? Lawson Wood poses this question while comparing the muck diving found in his home country of Scotland to that found in exotic locations in Asia and other regions of the world, renown for their muck diving sites.

There are many factors to consider when planning your dive trip, including the marine life, travel logistics, seasonal weather, ocean conditions and distance between dive sites. This is a lot to think about, and likely the reason so many of us, especially photographers, forget to consider one of the ocean’s most important processes when planning a trip—the tides.