We are in the middle of our second ‘mooring frenzy’ right now so the blog has not been updated in a while. Moorings are lines of rope with a heavy weight in one end (three railway wheels in our case) and a buoy that floats in the other. On the taut line in between the buoy and the weight we have attached instruments that measure temperature, salinity, pressure and current velocity. The buoy at the top is floating at about 300 m depth, this is as high as we dare in order to not have it run over by icebergs.
Next to the weight there is an acoustic releaser. It has a robotic hook that is attached to the weight, and when you send a sound with the right frequency down to it, the hook releases the weight and the whole mooring floats up to the surface where we can pick it up and recover our instruments.
This year we have several moorings to recover and to deploy, no less than 16 all in all from different nations. Norway and Sweden had 6 moorings back-to-back wich was a bit tough o the sleep. When the moorings have been recovered we donwload the data from the instruments, change batteries and perform simple service and repairs, and it takes a few hours for each mooring. Since ship time is so valuable we work around the clock if need be in order to not keep the ship waiting for us. So far we have done fine!
After a few quiet days we have now entered the British mooring frenzy. I am right now up at the bridge helping to note position etc for the deployment sites, but will try to find time later on to send more photos and news.