me" /><col class="desc" /></colgroup>
    <tr>
      <th>x</th>
      <td><p>longitude</p></td>
    </tr>
    <tr>
      <th>y</th>
      <td><p>latitude</p></td>
    </tr>
    </table>

    <h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>

    <p>a numeric vector of absolute bearing in degrees, see Details</p>
    <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2>

    <p>By convention the last value is set to <code>NA</code> missing value, 