elow the water surface, and then the
upcast phase that follows the downcast.  This is handled reasonably well by <code>ctdTrim</code> with
<code>method="downcast"</code>, although it is almost always best to use <code><a href="plotScan.html">plotScan()</a></code> to
investigate the data, and then use the <code>method="index"</code> or <code>method="scan"</code> method based on
visual inspection of the data.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-l