  A drifting wave-ice buoy, which was configured by mounting the OpenMetBuoy on
an ad hoc floating platform that we named Medusa, was deployed at the
L\"utzow-Holm Bay (LHB) marginal ice zone in Antarctica on 4 Feb 2022 during
the 63rd Japanese Antarctica research expedition. The wave-ice buoy,
Medusa-766, survived the Antarctica winter as the measurement duration reached
333 days. During the winter months, it was located deep in the ice cover with
the shortest distance to the ice-free Southern Ocean over 1,000 km; at this
time, there was evidence of ocean wave signals at the buoy position. Using the
directional wave spectra obtained from the ECMWF's reanalysis, we show that the
Medusa-766 observed waves were likely generated by an extratropical cyclone in
the Southern Ocean. Wave-induced ice breakup potential for such an event could
extend 100s km into the ice field. When Medusa-766 was in LHB in the summer
months, it did not detect sizeable wave energy despite the low sea ice
concentration extent even during on-ice waves events. Characterising the
considerable differences in the wave attenuation at LHB is needed to elucidate
the relative contribution of ocean waves to the unstable LHB fast ice. The
success of Medusa-766 demonstrates the robustness of the general design,
hardware, firmware, and the high sensitivity of the sensor used. The result is
promising for future LHB wave-ice interaction research.
