The AM/FM radio on my boat has a simple wire about 70 cm long as an antenna. It is much less effective than a car antenna. I say that because it has difficulty picking up stations that the car gets easily. At sunrise/sunset the effects of radio propagation become evident as the stations fade out entirely and no jiggling the antenna will help. Most puzzling, when listening to a weak station, I orient the antenna to get a clear signal. Then at irregular intervals varying from a minute to several hours, the sound fades out suddenly and I have to reposition the antenna to get it back. I move it left, right, up, down, bent straight ... a random orientation in 3D. It's does not seem to matter whether the boat is swinging at anchor, or tied in a fixed position to a dock. My first question, what is going on with these sudden fade outs, and why does a random reorientation of the wire help? Second question, how can improve the reception performance of this radio and antenna to match that of a car? Even the old fashioned whip antennas on old cars with 70cm length and fixed orientation seem to outperform this.