Section 176.77 - Stowage of barges containing hazardous materials on board barge-carrying vessels(a) A barge which contains hazardous materials may be transported on board a barge-carrying vessel if it is stowed in accordance with the requirements of this section.(b) A barge which contains hazardous materials for which only "on deck" stowage is authorized must be stowed above the weather deck and be vented to the atmosphere.(c) A barge which contains hazardous materials for which both "on deck" and "below deck" stowage is authorized may be stowed above or below the weather deck.Amdt. 176-30, 55 FR 52689, Dec. 21, 1990, as amended at 76 FR 56317 , Sept. 13, 2011