Instructions
Aim down the scope to your intended target.
Lock onto you intended target. This can be achieved by "staring" through the scope for a few moments. Be patient, as the scope has the tendency to lock on several things if you pause too long.
Press the trigger for firing and the javelin will find its intended target. Note that you must lock on to a target before firing the javelin. You can lock on vehicles, landscapes, containers and other components, making the javelin a very valuable weapon to learn how to use.