单项选择题 My Captain is trying to（）the pilot station before the ebb tide.

单项选择题 MV SKYCLIPPER RE OUR TELCONV YDAY N PREVEIOUS TLX DD 24 JUL HV SPKN TO OWNER N UR RECFM TO Z FLWG NORDER ENSURE VSLS FXTRE TO U. Following this passage will be（）.

单项选择题 Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of（）.