As a regular on the 'USCG Notices to Mariners' I see no mention of shoaling nor any mention of moving navigational aids in Rock Hall Harbor.. only this..
Mariners are advised that the swim portion of the “Rock Hall Triathlon” is scheduled to occur in Rock Hall Harbor on June 25,
2011 and June 26, 2011, from 8 a.m. to 10 a.m. on Saturday and from 9 a.m. to 10 a.m. on Sunday. Approximately 400
swimmers will compete on marked courses, counter-clockwise along a 1500-meter course on Saturday and a 750-meter course
on Sunday, at Rock Hall Landing Marina (Dock A) near Waterman’s Crab House. Bright yellow triangular turn buoys will mark
the northwest and southeast ends of the swim course. Swimmers will be supported by sponsor-provided kayaks and lifeguard
surfboards. Official patrol personnel on scene can be contacted on marine band radio channel 16 VHF-FM. For any comments
or questions, contact Coast Guard Sector Baltimore, Waterways Management Division, at (410) 576-2674 or
. Chart 12272.