![Figure F1. Angular conventions and tool orientation determination. A. In the geographic frame the geomagnetic field vector is described in terms of intensity (G), magnetic declination (Dec = angle formed between true Figure F1. Angular conventions and tool orientation determination. A. In the geographic frame the geomagnetic field vector is described in terms of intensity (G), magnetic declination (Dec = angle formed between true](http://www-odp.tamu.edu/publications/197_SR/005/images/05_f01.gif)
Figure F1. Angular conventions and tool orientation determination. A. In the geographic frame the geomagnetic field vector is described in terms of intensity (G), magnetic declination (Dec = angle formed between true
![Calculate earth's magnetic field at a place where angle of dip delta is 60^(@) and horizontal component of earth's magnetic field is 0.3 G Calculate earth's magnetic field at a place where angle of dip delta is 60^(@) and horizontal component of earth's magnetic field is 0.3 G](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/69130306_web.png)
Calculate earth's magnetic field at a place where angle of dip delta is 60^(@) and horizontal component of earth's magnetic field is 0.3 G
![The real angle of dip, if a magnet is suspended at an angle of 30^0 to the magnetic meridian and the dip needle makes an angle of 45 ^0 with horizontal is : The real angle of dip, if a magnet is suspended at an angle of 30^0 to the magnetic meridian and the dip needle makes an angle of 45 ^0 with horizontal is :](https://dwes9vv9u0550.cloudfront.net/images/4148878/0dacfdf8-ddf8-4d01-a97a-6a8d322d93ea.jpg)