Round slave variometer (vertical speed indicator). Requires I-ALT or EMSIS PFD or NESIS to be present on the CAN bus. -57 : Panel hole diameter 57 mm (2.25”) – standard aviation size. -80 : Panel hole diameter 80 mm (3.15”) – standard aviation size. -M : Scale in meters per second [-10, 10]. -FT : … Continue reading Variometer (VSI)