This week we worked on the ships two deck cranes. The ship has a port and starboard crane. We used them for loading and unloading equipment. We also used them to deploy different scientific equipment. The cranes are integrated to the ships hydraulic system. The system has two large pumps that continuously pump fluid through the system. When you would like to use one of the machines once the pumps are turned on you just need to open the valve for it. The cranes and pumps have been running really rough. We found the problem was air in the system. Because the system is constantly circulating we were able to just run the cranes for a while. Working them in all different directions till the air was all cleared out. We then cleaned and greased all the fittings, joints,and roles on both cranes. While we were doing our work, Don showed me how to operate the crane. It was really good to learn how they worked and I also got a lot of good practice running them.