33 CFR § 67.15-5
Seismographic and surveying operations
August 2, 2023
§ 67.15-5 Seismographic and surveying operations.
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.