Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
An underwater photographer next to you
There are dive computers that measure the pressure in a diver’s air tank and include this in their calculations. There are two ways to transmit that pressure to the dive computer. Either the computer is built into a console that is connected to the tank via a hose, or there is a pressure sensor attached to the tank that transmits the pressure to the computer via a radio signal. Using a separate sensor is considered a far superior solution. Consoles attached to hoses tend to dangle from a diver. There is a reason that these are called reef anchors. But, firing a powerful underwater flash can break the radio connection between a dive computer and a separate pressure sensor. It can, concerningly, cause the dive computer to crash.
I'll stick to my Timex but now I am concerned that taking pictures next to other divers may cause troubles for some of them.I can’t say that I’ve heard of that one. Clipped below is the entire section you were quoting from.
They’re just advocating for people to run out and spend thousands on a high end mechanical dive watch. Want a reliable backup time keeper/safety stop timer? Go get a Citizen EcoDrive for x < $200.
I'll stick to my Timex but now I am concerned that taking pictures next to other divers may cause troubles for some of them.