This is the third and final EVA to prepare the ISS for future commercial visiting vehicles.
Main task is the installation of the Common Communications for Visiting Vehicles antennas (C2V2) and Cable routing to the antennas.
The C2V2 booms and antennas were brought to the ISS aboard Dragon CRS-5.
Astronauts Barry Willmore (EV2) and Terry Virts (EV1) are the space walkers for this final EVA that took place on March 1, 2015. The C2V2 system consists of 2 booms with 4 antennas and 3 specialized reflectors that will require 400 feet of cable that will be routed from the center of the station structure out to the 2 booms.
“Butch” Willmore is now heading to the Starboard side of the station to the S3 truss where he’ll install the shorter C2V2 boom.
After both booms were installed, the astronauts proceeded to connect cables to the booms with the antennas. Afterwards, they installed the reflectors on both booms. This concluded US EVA-31.
Here are more views of the C2V2 antennas
Closeup photos of Antennas
C2V2 The C2V2 system in 1:100 scale