ptc.com.phptc.com.ph/wp-content/uploads/2017/07/STCW-Advisory-No-2017-07.pdf.2 Certificate of Sea...
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ptc.com.phptc.com.ph/wp-content/uploads/2017/07/STCW-Advisory-No-2017-07.pdf.2 Certificate of Sea service ... Major Patron or Minor Patron licenses issued by Professional Regulation
