***Link*** :: [§ 91.121 Altimeter settings.](https://www.ecfr.gov/current/title-14/section-91.121) ***Description*** :: `= this.link` ***Author*** :: [[FAA]] ***Key Quotes***: * Each person operating an aircraft shall... set, when operating... * Below 18,000 feet MSL, to * current reported altimeter setting of a station along the route and within 100 nautical miles of the aircraft... * At or above 18,000 feet MSL, to 29.92″ Hg. #source #far