These sleds contain everything they need for several months except for some equipment that gets resupplied to them by air. Later, they pitched their camp right next to the pole. You can see a picture of their tent and their supplies. It is amazing how the DOMs were put in the ice in a hole 2 km deep. First, a hot water drill is used to make the hole.
Hot water is used to melt the ice.
Because ice is a very good insulator, the hole remains water for several days. Once the hole is ready, we rush out and take the string of modules and lower them into the hole. It takes about 12 hours to complete this procedure. As this procedure must be done outside, people get very cold. After we lower the string, we must wait several days before the ice freezes.