# Vector 21
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Introduced in **0.2.414**
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Vector 21 is a binocular rangefinder with day optics, an integrated 3-dimensional, 360° digital compass and a precise class 1 eye-safe laser rangefinder. It provides distance measurements up to 12 km with 7x magnification.
Vector 21
The engraved reticle has a line spacing of 10 mils and line-dot spacing of 5 mils. 1 mil corresponds to 1 m spacing at a distance of 1 km. In the image below you can see a 1 m cube being sighted at 100 m being exactly 10 mils.
Sighting of a 1 m wide cube at a distance of 100 m with Vector 21
While looking through the binocular view you can perform the following actions:
| Keys | Description | Examples |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- | -------------------------------- |
| Press and hold **`R`** key. Hold target for \~2 seconds in red targeting square. Release **`R`** key. | Measures distance in meters to target. | |
| Press and hold **`V`** key. Hold target for \~2 seconds in red targeting square. Release **`V`** key. | Measures azimuth in degrees to target. | |
| Press and hold **`R+V`** keys simultaneously. Hold target for \~2 seconds in red targeting square. Release **`R+V`** keys. | Measures distance in meters and azimuth in degrees to target. |  |
| Press and hold **`R`**, tap **`C`** to mark first point, move to second point and release **`R`** | Measure distance between 2 points. |  |
| Tap **`R`** once, press and hold **`R`**, tap **`C`** to mark first point, move to second point and release **`R`** | Measure horizontal and vertical distance between 2 points. |  |
| Tap **`V`** once, press and hold **`V`** for \~2 seconds and release. | Measure azimuth and inclination to a point. |  |
| Tap **`R`** once, press and hold **`R`** for \~2 seconds and release. | Measure horizontal and vertical distance to a point. | |
| Press and hold **`V`**, tap **`C`** to mark first point, move to second and release **`V`**. | Measure distance and azimuth between two objects. |  |
|
Tap V, press and hold V, tap C to mark first point (original target), move to second (arty impact) and release V.
The results are displayed together with letters (A. - add, d. - drop, L. - left, r. - right) which indicate the necessary correction terms together with the distance.
Example: If a shot is left and short, the correction is r.. and A.. with the appropriate value.
| Measure fall of shot between target and arty impact for correction. |  |
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