33 C.F.R. § 401.83 Reporting position at anchor, wharf, etc.
Title 33 - Navigation and Navigable Waters
A vessel anchoring in a designated anchorage area, or elsewhere, and a vessel mooring at a wharf or dock, tying up to a canal bank or being held on a canal bank in any manner shall immediately report its position to the vessel traffic controller and it shall not resume its voyage without the vessel traffic controller's permission.
Title 33: Navigation and Navigable Waters
PART 401—SEAWAY REGULATIONS AND RULES
Subpart A—Regulations
Information and Reports
§ 401.83 Reporting position at anchor, wharf, etc.