00492 2200133 4500245017500000020002200175250001700197110004000214650000800254005001900262260005400281041001200335084001100347 aModel Course 1.31 b : Second-Class Radioelectronic Certificate For Global Maritime Distress and Safety System Radio PersonnelcInternational Maritime OrganizationhText a978-92-801-5118-3 a2002 Edition aInternational Maritime Organization aIMO a20241024130656 aLondonbInternational Maritime Organizationc2002 aEnglish a623.82