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.