[Code of Federal Regulations] [Title 46, Volume 7] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR197.342] [Page 430] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 197_GENERAL PROVISIONS--Table of Contents Subpart B_Commercial Diving Operations Sec. 197.342 Buoyancy-changing devices. (a) A dry suit or other buoyancy-changing device not directly connected to the exhaust valve of the helmet or mask must have an independent exhaust valve. (b) When used for SCUBA diving, a buoyancy-changing device must have an inflation source separate from the breathing gas supply.