Notation	Name	Description	Status
airFixed	Air (fixed)	Airborne station/platform, at fixed position	stable
airMobile	Air (mobile)	Airborne station/platform, moving around	stable
lakeRiverFixed	Lake/River (fixed)	Station/platform at lake/river surface, at fixed position	stable
lakeRiverMobile	Lake/River (mobile)	station/platform at lake/river surface, moving around	stable
landFixed	Land (fixed)	Station/platform on solid terrain, at fixed position	stable
landMobile	Land (mobile)	Station/platform on solid terrain, moving around	stable
landOnIce	Land (on ice)	Station/platform on ice-covered ground, moving with the ice	stable
seaFixed	Sea (fixed)	Station/platform at sea surface, at fixed position	stable
seaMobile	Sea (mobile)	Station/platform at sea surface, moving around	stable
seaOnIce	Sea (on ice)	Station/platform on floating ice, moving with the ice	stable
spaceBased	Space-based	Satellite platform in orbit	stable
underwaterFixed	Underwater (fixed)	Station/platform under water, at fixed horizontal position	stable
underwaterMobile	Underwater (mobile)	Station/platform under water, moving around also horizontally	stable
unknown	unknown	The station/platform type is unknown.	stable