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