34.An international standard for vector charts (S-57) has been finalized by and vector charts complying with this standard produced by or on the authority of, a national hydrographic office are known as electronic navigational charts.
(A)IHO
(B)ISO
(C)NOS
(D)DMAHTC

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統計： A(173), B(22), C(19), D(6), E(0) #612379