Positions quoted in this Preliminary Notice reproduced below are referred to WGS84 or a compatible datum and may be plotted directly on this ENC. 								
Some or all of the information contained in this Notice to Mariners may have been included on the ENCs affected.								
								
1981(P)/26 CHINA —  South Coast — Vessel traffic services. Radio reporting lines. Anchor berths.								
Source: Chinese Chart 16770								
								
	1. There have been changes to the VTS limits in the Gulf of Tonkin. New radio reporting lines, inbound and outbound, have been established joining the following positions:						
								
		Fangcheng VTS						
								
		21° 34' .85N. , 108° 19' .00E.	
					
		21° 26' .98N. , 108° 19' .01E.	
					
		21° 26' .98N. , 108° 27' .03E.	
				
		21° 33' .38N. , 108° 27' .03E.						
								
		Qinzhou Wan VTS						
								
		21° 38' .56N. , 108° 33' .01E.		
				
		21° 24' .52N. , 108° 33' .01E.
						
		21° 24' .51N. , 108° 42' .01E.	
					
		21° 41' .60N. , 108° 42' .04E.						
								
		Beihai VTS						
								
		21° 26' .24N. , 109° 05' .98E.		
				
		21° 33' .99N. , 108° 57' .02E.	
					
		21° 20' .00N. , 108° 57' .01E.	
					
		21° 20' .00N. , 109° 05' .94E.						
								
	2. The former Qinzhou VTS radio reporting line has been deleted joining the following positions:						
								
		21° 38' .12N. , 108° 31' .98E.	
					
		21° 20' .02N. , 108° 31' .98E.	
				
		21° 20' .03N. , 108° 44' .46E.
						
		21° 36' .49N. , 108° 44' .47E.						
								
	3. The following anchorage berths have been removed, centred on:						
								
		Berth designation		Position

		B4				21° 28' .52N. , 108° 22' .19E.

		B5				21° 28' .99N. , 108° 22' .84E.

		B8				21° 28' .49N. , 108° 23' .40E.
								
	4. These changes will be included in a New Edition of Chart 3992 to be published mid 2026.						
								
	5. Charts 3938, 3999, 1728 and 3892 will be updated by Notice to Mariners.						
								
	   (CGCS 2000 DATUM)