>
<dd><p>optional unit to use. If not supplied, a sensible unit is used,
depending on <code>item</code>. And, even if supplied, <code>unit</code> is ignored for many <code>item</code>
values for which it make no sense, e.g. <code>"oxygen ml/l"</code>, <code>"Conductivity Ratio"</code> and <code>"Absolute Salinity"</code>. Only the oce developers should consider
supplying a value for <code>unit</code>.</p></dd>


<dt id="arg-debug">debug<a class="anchor" aria-label="anchor" href="#arg-debug"></a></dt>
<dd><p