G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

1. AA horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
2. BA vertical antenna placed between 1/4 and 1/2 wavelength above the ground
3. CA horizontal dipole placed at approximately 1/2 wavelength above the ground
4. DA vertical dipole placed at approximately 1/2 wavelength above the ground

Pick an answer to check it.