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GMDSS.1/Circ.23 of 04.03.2019 - Master Plan Of Shore-Based Facilities For The Global Maritime Distress And Safety System (GMDSS MASTER PLAN)
MSC.1/Circ.1364/Rev.1 of 25.11.2016 - INTERNATIONAL SAFETYNET MANUAL
MSC.1/Circ.1403/Rev.1 of 25.11.2016 - IMO NAVTEX SERVICE MANUAL
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