A.from any INMARSAT satellite B.via any appropriate Navtex and EGC station C.via the satellite the MES is tracking D.from any RCC and coast station
A.four B.six C.five D.three
A.selective and can be suppressed by ships B.mandatory and can not be suppressed by ships in the affected area C.not very important so that ships don‟t require them D.received by all ships wherever they are