span class="va"><a href="https://dankelley.github.io/oce/">oce</a></span><span class="op">)</span></span>
<span><span class="co">#&gt; Loading required package: gsw</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/utils/data.html" class="external-link">data</a></span><span class="op">(</span><span class="va">sealevel</span><span class="op">)</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span