581  
WHUS72 KKEY 181536  
MWWKEY  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE KEY WEST FL  
1036 AM EST WED DEC 18 2024  
 
GMZ033-034-182200-  
/O.NEW.KKEY.MF.Y.0004.241218T1536Z-241218T2200Z/  
GULF WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE 20 TO 60 NM OUT  
AND BEYOND 5 FATHOMS-  
GULF OF MEXICO INCLUDING DRY TORTUGAS AND REBECCA SHOAL CHANNEL-  
1036 AM EST WED DEC 18 2024  
   
..DENSE FOG ADVISORY IN EFFECT
 
 
* WHAT...DENSE FOG WILL REDUCE VISIBILITY TO 1 MILE OR LESS.  
 
* WHERE...GULF WATERS BEYOND 5 FATHOMS INCLUDING THE DRY  
TORTUGAS.  
 
* WHEN...UNTIL 5 PM EST THIS AFTERNOON.  
 
* IMPACTS...A DENSE FOG ADVISORY MEANS THAT VISIBILITIES WILL BE  
REDUCED TO ONE NAUTICAL MILE OR LESS. LOW VISIBILITY WILL MAKE  
NAVIGATION DIFFICULT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED BOATERS SHOULD AVOID OPERATING IN THESE CONDITIONS.  
IF YOU MUST OPERATE, PROCEED WITH CAUTION. USE PROPER FOG  
SIGNALS. MAKE SURE ALL RUNNING LIGHTS ARE ON. REMEMBER TO USE  
YOUR RADAR, GPS AND COMPASS. ASSIGN A MATE TO TAKE WATCH AWAY  
FROM ENGINE NOISE TO ALLOW FOR RECEPTION OF FOG SIGNALS.  
 

 
 

 
 
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