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  <ul class="dropdown-menu" aria-labelledby="dropdown-articles"><li><a class="dropdown-item" href="../articles/A_oce.html">1. Introduction to Oce</a></li>
    <li><a class="dropdown-item" href="../articles/B_ctd.html">2. Analysis of CTD data</a></li>
    <li><a class="dropdown-item" href="../articles/C_adp.html">3. Analysis of acoustic-Doppler data</a></li>
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