cale"</code>,
then just the scale is returned.</p></li>
<li><p>If <code>i</code> is a string ending in <code>"Flag"</code>, then the corresponding data-quality
flag is returned (or <code>NULL</code> if there is no such flag).</p></li>
<li><p>If the object holds hydrographic information (pressure, salinity,
temperature, longitude and latitude) then another set of possibilities
arises.  If <code>i</code> is <code>"sigmaTheta"</code>, then the value of <code><a href="swSigmaTheta.html">swSigmaTheta()</a></code