单项选择题
A.Notices to Mariners
B.Sailing Directions
C.List of Lights and Signals
D.Guide to Port Entries
单项选择题 LOW AT 34N 135E ESLY SLWLY INTST NC．This description is most likely to be under the heading of（）.
单项选择题 LOW ABOUT 300 MILES SOUTHWEST OF LISBON 1004 MOVING SLWLY SOUTHEAST COMMA FILLING 1006 BY MIDNIGHT.This phrase is likely to be under the heading of（）.
单项选择题 Information for updating nautical charts is primarily found in the（）.