As if 13/11/14 This quest is bugged for me, EU horde side on Earthen Ring. A bunch of other people stuck here are too. There is no way to interact with NPC's or the telescope and no perceivable way around it. Opened a ticket, will update when I know more :)
UPDATE:
Not sure if its legit as I'm testing it now, but a friend of a friend has told me logging out, waiting 10 seconds then logging back in worked for them. Trying it now, it's not ideal but it's worth a shot and saves time if it does work! Good luck!
UPDATE: That did not work for me and a few others but it does not mean you should not give it a try anyways I suppose :/
UPDATE: A friend said he went into the Group finder > Questing and joined a team and used the Master Surveyor there with no problem, haven't had chance to see if it works but try it yourself if it saves time :)
THIS WORKED FOR ME! Establish Your Garrison steps to complete: Join a group or make a group in the Questing section of Group Finder. Invite anyone and everyone, click the Master Surveyor, this worked for 100% of people I invited and it worked for my friends who did it too. Hope this helps people get along as I have waited almost 2 hours for this :) Happy questing! Good luck! Many thanks to Earthen Ring for helping me figure this out, (Gaurak - Earthen Ring) :)
You can make a group and help others as I am doing now, there are so many needing assistance. We will look out for each other in this community :)