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FS2004 Tri-Speed Gauges. Two analog instruments (TSG150 and TSG220) that display airspeed, ground speed and taxi speed. The TSG150 gauge shows indicated airspeeds to 150 kts, ground speeds to 180 kts, and taxi speeds to 20 kts. The TSG220 gauge shows indicated airspeeds to 220 kts, groundspeeds to 280 kts, and taxi speeds to 20 kts. Both contain an adjustable speed bug. By Glenn Copeland.