Looking at the recent photos posted on the Crozet Dxpedition website:
http://crozet2022.r-e-f.org/news.htmlIt looks like the fiberglass guyed mast is supporting a doublet style wire antenna fed with ladder line.
The ATU sitting on the desk is an MFJ-998RT remote auto tuner (installed at the bottom of the mast) that can handle up to 1.5KW.
Hard to tell from the photo buy looks like the lowest frequency the doublet is cut for is 40M band.
I believe from sources that the radio setup is a Kenwood TS590SG and there is also a Acom 1010 amplifier as well.
73'
John VK3YP