PM-1has the lowest latitude and elevation of the Phlegra Montes sites, a clear association with LDAs (local ice deposits expressed as lobate debris aprons), well developed polygons (one of the indicators of ice-related morphologies), and has the highest SWIM (Subsurface Water Ice Mapping) score for geomorphic indicators of ice;
AP-1(Arcadia Planitia) appears to be one of the safest sites and has a moderate combined SWIM score for ice;
AP-9has the thickest ice from radar returns (of the Arcadia Planitia sites) and geomorphology indicating shallow ice. It has the highest combined SWIM score for ice, but appears slightly rocky and rough;
EM-16has a clear association with an LDA with nearby brain terrain and the strongest radar return for shallow ice and the highest combined SWIM score of the Erebus Montes sites;
AP-8(Arcadia Planitia) appears to be one of the safest sites and has the highest neutron and combined SWIM scores for ice;
EM-15(Erebus Montes) is associated with a prominent but less extensive LDA, has well developed polygons, nearby brain terrain and appears smooth;
PM-7is adjacent to lineated valley fill (attributed to glacial flow) and appears to be the safest of the Phlegra sites.
https://www.hou.usra.edu/meetings/lpsc2021/pdf/2420.pdf 
