We planned to one person stay at depth of the “Big Crack”, another person holding the measuring tape, and then another person using the measuring tape. We would measure the width of the crack and then also use a buoy to mark every 20 meters. We practiced a couple times on how everything would play out in the water.
The water at Davidsgja was about 6-8 deg.C. A nice warm up from Silfra. The visibility was about 15 meters. I think the visibility at the bottom of the crack (approximately 160 meters from our starting point) was about 20-30 meters. Very Beautiful.
We had a couple of hiccups during the task. For one, the diveshop didn’t have a measuring tape, so we had created our own from a line and some electrical tape. This made measuring easy to spot the 1 meter tags, but difficult when trying to reel the line back in. Consequently, it took us longer to measure out 20 meter increments. We also had to split the task into two separate dives because of the length of the task.