CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 105–199) > SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS (Parts 171–181) > PART 176—CARRIAGE BY VESSEL > SUBPART G—Detailed Requirements for Class 1 (Explosive) Materials (§176.100 to §176.194) > 176.180—Watchkeeping.