The DMCR (Department of Marine and Coastal Resources) had previously left around 200 reef cubes underwater at locations in Koh Tao. These were to be used to create artificial reef structures. The initial dropping of these blocks can be imprecise due to top side conditions and now that they underwater conditions are clearer they needed to be relocated into a more ‘reef like’ pattern.
The first location to be tackled was Twins. The idea was to make the large cubes just buoyant enough so they could be physically lifted by divers and ‘walked’ to their proper location.
So firstly huge life bags needed to be attached and filled carefully so that just enough air was used to make the cubes just a little floaty. Good communication was needed here between the lifters and the filler. Once the lifters could budge the cube then filling needed to stop. The majority of the cubes were being walked to a slightly shallower depth so great care has to be take with air expansion.
A diver was positioned above to be able to regulate the liftbags dump valve if necessary. Once the block was in its proper location then the air was released and the process repeated.
Volunteers are out again today to continue the work and we will join them again tomorrow if there are still cubes to be moved. If not there are plenty to be moved in Aow Leuk and Hin Ngam which we hope to be able to help out with too.
Stay tuned to our Facebook page for more information and for when the next cube expedition will take place!