The latest Local Notice to Mariners (this week, #23) reports issues for four of the gov't buoys that we use as marks on MBSA List A --

D, Tinkers Rock Gong, sound signal weak. 

K, Boston Lighted Whistle, light extinguished.

S, Thieves Ledge Whistle, temporarily discontinued. 

Y, Scituate Approach Gong, reduced intensity.