Chart editions / corrections
| * 17671 | Chart: 611, 612 | 
| Sweden. Northern Baltic. Stockholm archipelago. S of Rådmansö. V of Gräskö. SV of Yxlan. Buoyage. | |
| 
 | 
| Replace | south cardinal spar buoy | with south cardinal light spar buoy Q(6) LFl 15s | a) | 59-34,456N | 018-40,431E | 
| Replace | east cardinal spar buoy | with east cardinal light spar buoy Q(3) 10s | b) | 59-40,704N | 018-58,685E | 
| Replace | port hand spar buoy | with port hand light spar buoy Q R | c) | 59-40,683N | 018-59,03E | 
| Replace | east cardinal spar buoy | with east cardinal light spar buoy Q(3) 10s | d) | 59-40,965N | 018-59,600E | 
