“Leave the dock to continue your search for the firing pin.”
“Head outside” is an objective in the mission A Khvostov Rising in Destiny: Rise of Iron
Walkthrough[edit]
Start with clearing out the Fallen in Dock 13 and go toward the Divide. Just inside the Wall you will find more Vandals and Dregs.
Once in the Divide, head to the circle in front of you. This is where the Guardian can perform their second scan to try and find the Firing Pin they are looking for.