  The transient sky is composed of diverse phenomena that exhibits dramatic
changes on short timescales. These events range from sub-second bursts to weeks
and month timescale variability from compact systems. Several challenges need
to be addressed by any facility that aims to observe such events: a fast
re-positioning scheme to trace the first moments of events like Gamma-Ray
Bursts (GRBs), a large field of view to be able to detect new Fast Radio Bursts
(FRBs), or high sensitivity and high cadence to detect the outflows and flaring
activity in Galactic binaries. Combined with a large bandwidth in order to
recover the spectral information from these sources, it would allow us to
unveil the physical processes taking place in these systems. The new
Multipurpose Interferometer Array (MIA) in Argentina may represent a suitable
facility to conduct deep and leading-edge studies on the transient sky as the
aforementioned ones. Additionally, there is a significant interest from the
community on the possibility of connecting the 30-m IAR antennas within a VLBI
network such as the European VLBI Network (EVN). This would place Argentina in
the map to achieve very-high-resolution (on the milliarcsecond level)
observations. This mode, together with the observations with the MIA would open
a potential new regime that would allow astronomers to significantly increase
the knowledge on the Southern Sky.
