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（）.

单项选择题 Lay days（）to commence after the expiry of a specified time after the giving of the notice of readiness to load or discharge.