Hi all, I want to start doing blackwater diving in my hometown, we have the proper boat and the lights, but I'm not sure how to organize the lights line. We are planning to go to a site almost 100 metres depth and place a line with a big buoy on top, 25 meters long line with weights on the other end, and with an arm 75 cm long with a powerful light on each end every 5 meters. Our plan is to leave the line in the sea for a while and dive with the boat skipper following us close enough to take care of ourselves. Do you think is the right way ? or am I missing something ? It's our first time doing blackwater diving

Depth is a relative and non-essential factor; instead, you need to study the seafloor topography of the area where you plan to dive. The 75 cm arm is unnecessary. Dive lights must be securely fastened to the buoy line, using one of the many available solutions. Furthermore, for your safety, it is crucial to check the currents at the dive site: it is easy to get lost if there is a current, especially when you are focused on taking photos after finding a subject. The buoy must be highly visible, even if a skipper is following you. Always carry backup lights with you. Overly powerful lights are not necessarily important: 5000-7000 lumens are more than enough. Finally, make sure the battery life is sufficient to last the entire dive.