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    Variable FACILITY_TYPESConst

    FACILITY_TYPES: readonly [
        "AIRPORT",
        "HELIPORT",
        "SEAPLANE_BASE",
        "GLIDERPORT",
        "ULTRALIGHT",
        "BALLOONPORT",
    ] = ...

    The full set of FacilityType values, in declaration order.

    Use as the single source of truth for value-side iteration (e.g. building a lookup table keyed by facility type) or with isFacilityType to narrow an external string into the union. The as const satisfies brand keeps this array in sync with the type at compile time.