The ARMEMS cruise deployed 15 ocean bottom seismometers (OBS) in the deep waters of the Gulf of Lion for 38 days of seismic passive recording that spanned between September 28th and November 4th, 2024. 9 of the OBSs come from the UMR Geo-Ocean's instrument pool and are equipped with short-period analog geophones. The 6 other instruments are MicrOBS leased from Sercel and equipped with MEMS digital accelerometers. The objectives are (1) to validate these latest-generation sensors for recording microseismic ambiant noise, and (2) to exploit these low-frequency signals using seismic interferometry techniques to image the structure of the subsurface - sediment and basement - of the Gulf of Lion margin, in order to understand the geological processes that lead to it formation. ARMEMS comprises 2 legs: the first, from September 26th to 30th, saw the 15 OBSs deployed from the RV L'Europe; the second, from November 4th to 7th, saw all the instruments recovered using the sailing vessel Jaja-4, a solution that was chosen in order to adapt to the highly variable local weather conditions. A power spectral density (PSD) analysis of the recordings shows usable data from all the sensors in all the instruments. The instrumental noise levels confirm previous tests carried out on land, and allow us to envisage an analysis of the microseismic ambiant noise down to 0.1 Hz, work which will be undertaken as part of a PhD thesis.