33 C.F.R. § 67.15-5 Seismographic and surveying operations.
Title 33 - Navigation and Navigable Waters
All stakes, casings, pipes, and buoys, except bamboo poles and wooden stakes less than 2 inches in diameter, placed in the water to facilitate seismographic or surveying operations shall be marked, in the manner prescribed by the District Commander, for the safety of navigation.
Title 33: Navigation and Navigable Waters
PART 67—AIDS TO NAVIGATION ON ARTIFICIAL ISLANDS AND FIXED STRUCTURES
Subpart 67.15—Miscellaneous Marking Requirements
§ 67.15-5 Seismographic and surveying operations.
