Get over to the Southwestern corner of the Hub of Heroism In the Southwestern corner of the area you will find a button behind a column of sorts. Jump up to it and push the button. This will open the nearby shutter just a bit. Crouch and head underneath it. Head down the short corridor and go over to the water flow. Follow the water to where it first drops. Just to the right of that you will find the final ECHO Log.
Boarding Party Mission Objectives
Turn in: Jack's Office Bounty Board