This program is used for calculate the coordinates of the Instrument,
which know the coordinates of the Backward, the distance from the
Instrument to the Backward, coordinates of the Forward, the distance from
the Instrument to the Forward and the opening angle from the Backward
to the Forward.

- You can enter the angle in a decimal number.
- You can switch the display of results in a 3 decimal or 10 decimal by
tapping on the N or the E display box.
- Manual inside the app.