The crew of an assault amphibious vehicle peers out of its hatches awaiting clearance to traverse a demolished tank berm Jan. 21 at LZ Dodo in the Central Training Area. “Over the past decade, we haven’t had to use these core skills,” said Capt. Timothy G. Ernst. “This training event is designed to hone and sharpen our capabilities outlined in the deliberate defense and breaching operations doctrine.” Ernst is the commanding officer of Combat Engineer Co., Combat Assault Bn., 3rd Marine Division, III MEF. The AAV is with Assault Amphibious Vehicle Co., CAB. - The crew of an assault amphibious vehicle peers out of its hatches awaiting clearance to traverse a demolished tank berm Jan. 21 at LZ Dodo in the Central Training Area. “Over the past decade, we haven’t had to use these core skills,” said Capt. Timothy G. Ernst. “This training event is designed to hone and sharpen our capabilities outlined in the deliberate defense and breaching operations doctrine.” Ernst is the commanding officer of Combat Engineer Co., Combat Assault Bn., 3rd Marine Division, III MEF. The AAV is with Assault Amphibious Vehicle Co., CAB.