单项选择题
IMO has decided that all ships over 300TGt must be fitted with a NAVTEX receiver（）.
A.by 01 Feb 1992 B.by 01 Aug 1993 C.between 01 Feb 1992 and 01 Feb 1999 D.before 01 Feb 1992
单项选择题 You are signing on a deck officer，who will be designated as one of the GMDSS operators，before sailing foreign．Which statement is TRUE（）.
单项选择题 Which statement is TRUE（）.
