Getting to the mission:
Once you have accepted the mission, you will be able to use the portal in the southern room in the Agency building. Doing so will take you directly to the Unicorn Outpost.
Portal from the Agency to the Unicorn Outpost.
Once you are at the Unicorn Outpost, your mission marker should show you where to head to.
At the mission marker, you should find another portal.
The Unicorn Outpost offers a free of charge shuttle transport that will take you to the derelict ship.
On the ship:
When you are on the ship, you need to find the flight deck. In our experience, we have always found the flight deck at the location shown below on the map.
Flight deck location.
It is not required to kill all the aliens on the ship to plant the bomb, but you must not have agro in order to activate it. However, in the flight deck you will find Kyr'Ozch Brigadier General as well as an add. He is stood in the general location where you need to plant the bomb, so it might be adviseable to take him out first.
Kyr'Ozch Brigadier General.
When you are stood in the right location on the flight deck, you will receive a message stating that you are in a good location. Right click the bomb kit in your inventory. Once the bomb has been set up, you will get a 1 minute countdown timer running in your NCU. You must evacuate the ship within this one minute timer.
As soon as you have exited the ship, the timer will cancel and your mission will update. It should now state you need to visit the agency to claim your reward.