You need three points in a triangulation problem yes: target, observation point 1, observation point 2. We've only got observation point 1's location as a known value.There are several problems with your reasoning, actually:

* First, the distance between observation point 1 and target point is _not_ known to any accuracy, nor (more importantly) is the bearing. This eliminates observation point 1 from use in triangulation and probably eliminates the use of triangulation in and of itself.

* Second, if the observations are accurate enough, even reasonably close observation points can still be sufficient in triangulation. They aren't at all accurate.

* Third, there _isn't_ an observation point 2, unless I missed something somewhere (which is quite possible, I admit).

* Fourth, the target point may not actually be Kei's current location. We know someone grabbed her and got her out there. That doesn't mean *she's still there*. For that matter, unless observation points are measured simultaneously _or_ accounting for distance (which we don't have, I'll remind you), the value for the target point received from triangulation is incorrect.

As far as I can tell, trying to determine her location at this point by that method is futile because there just isn't enough information to work with.