You may be familiar with Canadian Forces Station Alert, based up on the northern tip of Ellesmere Island. It's a direction-finding and signals-intelligence station, as well as a weather station. It doesn't sit within any satellite footprint so we can't have satellite communications into it from the south. For it to communicate south, we have a microwave system that travels the length of Ellesmere Island down to Eureka, where Environment Canada has a weather station. At that location, the microwave system connects to a satellite system to allow communications with Alert.
Because it's a very unforgiving environment for battery systems and microwave systems, they have to be tuned and maintained. So every year we run Operation Nevus, which is basically a month-long maintenance mission. We send up soldiers, and helicopters, and maintenance folks to go and look after the batteries and to remediate anything that needs to be remediated, and to bring it back. It's an annual task.