/// <summary>
/// Converts an object into its XML representation.
/// </summary>
/// <param name="writer">The <see cref="T:System.Xml.XmlWriter"/> stream to which the object is serialized.</param>
public void WriteXml(XmlWriter writer)
{
writer.WriteStartElement("Speed");
_speed.WriteXml(writer);
writer.WriteEndElement();
writer.WriteStartElement("Bearing");
_bearing.WriteXml(writer);
writer.WriteEndElement();
}