A vertical quarter wave antenna with a good ground connection will:

A vertical quarter wave antenna exhibits a radiation pattern that is omni-directional when it has a good ground connection. This type of antenna is designed to operate in such a way that it radiates signals evenly across a full 360-degree horizontal plane. The ground acts as a reflective surface, enhancing the antenna's ability to radiate effectively in all directions horizontally while reducing radiation in the vertical plane.

This characteristic makes the quarter wave antenna ideal for various applications, particularly in maritime communication, as it provides reliable communication coverage without favoring any specific direction. In contrast, the other options do not accurately describe the inherent properties and operational nature of a vertical quarter wave antenna with a good ground connection.