  Over the past decade, observations of relativistic outflows from outbursting
X-ray binaries in the Galactic field have grown significantly. In this work, we
present the first detection of moving and decelerating radio-emitting outflows
from an X-ray binary in a globular cluster. MAXI J1848-015 is a recently
discovered transient X-ray binary in the direction of the globular cluster
GLIMPSE-C01. Using observations from the VLA, and a monitoring campaign with
the MeerKAT observatory for 500 days, we model the motion of the outflows. This
represents some of the most intensive, long-term coverage of relativistically
moving X-ray binary outflows to date. We use the proper motions of the outflows
from MAXI J1848-015 to constrain the component of the intrinsic jet speed along
the line of sight, $\beta_\textrm{int} \cos \theta_\textrm{ejection}$, to be
$=0.19\pm0.02$. Assuming it is located in GLIMPSE-C01, at 3.4 kpc, we determine
the intrinsic jet speed, $\beta_\textrm{int}=0.79\pm0.07$, and the inclination
angle to the line of sight, $\theta_\textrm{ejection}=76^\circ\pm2^{\circ}$.
This makes the outflows from MAXI J1848-015 somewhat slower than those seen
from many other known X-ray binaries. We also constrain the maximum distance to
MAXI J1848-015 to be $4.3$ kpc. Lastly, we discuss the implications of our
findings for the nature of the compact object in this system, finding that a
black hole primary is a viable (but as-of-yet unconfirmed) explanation for the
observed properties of MAXI J1848-015. If future data and/or analysis provide
more conclusive evidence that MAXI J1848-015 indeed hosts a black hole, it
would be the first black hole X-ray binary in outburst identified in a Galactic
globular cluster.
