The Metropolitan Police Department has issued a notice regarding restrictions for watercraft activity on the Potomac River during the upcoming Fourth of July celebrations. Set to ensure safety during the festivities, the guidelines specify anchorage and navigational limits effective from 9 a.m. on July 4 until 9 a.m. the following day. Boaters are advised to plan accordingly to accommodate the altered waterway access between the 14th Street Bridge and the Theodore Roosevelt Bridge.