单项选择题
A.the most common method B.too expensive for common use C.generally safe to sea life D.authorized only with prior approval of the governmental On-Scene Coordinator
A.by the Radiotelegraphy Authority of a country B.in accordance with the Government Regulations C.by Complying with the Provisions of the international Conventions D.under the Provisions of the SOLAS Convention
A.IMDG conference B.American Bureau of Shipping C.International Maritime Organization D.American Institute of Maritime Shipping