English: An aviation boatswain’s mate (handling) signals to the pilot of an MH-60S Sea Hawk helicopter assigned to the “Wild Cards” of Helicopter Sea Combat Squadron (HSC) 23 on the flight deck of the amphibious assault ship USS Boxer (LHD 4). The Boxer Amphibious Ready Group (ARG) is underway off the coast of Southern California completing a certification exercise (CERTEX). CERTEX is the final evaluation of the 13th Marine Expeditionary Unit (13th MEU) and Boxer ARG prior to deployment and is intended to certify their readiness to conduct integrated missions across the full spectrum of military operations.