fish314
Well-Known Member
As for HSI's, many of them have a built in bearing pointer (all the ones I have used), especially some of the more advanced electronic HSI's. If they do, finding your orientation is easy: head of the bearing pointer points to the station (it points to the Magnetic Bearing of the station, actually). Tail of the bearing pointer is the radial you are on.
If they don't have a bearing pointer built in, and all they have is a needle, you could use it the same way you do an OBS needle: Spin the course selector until you center the needle with a "to" indication (if it has an arrow-head type To/From, the arrowhead points to top of the course select needle, not necessarily the top of the case of the instrument). Then the head of the needle is the bearing to the station, tail is the radial you are on.
If they don't have a bearing pointer built in, and all they have is a needle, you could use it the same way you do an OBS needle: Spin the course selector until you center the needle with a "to" indication (if it has an arrow-head type To/From, the arrowhead points to top of the course select needle, not necessarily the top of the case of the instrument). Then the head of the needle is the bearing to the station, tail is the radial you are on.