A crossing of Antarctica must touch any point on the ACSA. If it does not touch the ACSA, then your journey is not a crossing. Select another path.
There are multiple forms of support, check definitions under Guidelines / Aid
Select more than one Mode of Travel if the additional mode is planned and will be sustained and repetitive. If you prefer to use sub-mode terminology instead, add it below
Examples: Fatbike, Catamaran, Snowshoe etc.