Commonly called a ditch bag. I have the following items in mine. A water proof ditch bag that floats and has long adjustable straps, 2 inflatable life jackets, 2 type 1 life jackets, a hand held VHF radio that floats, flares -12 ga. shotgun type in a sealed plastic bag, EPIRB with tether ,a length of float-able rope, chocolate,2 quarts of water, knife-float-able, strobe lights,anything else that floats depending upon how far of shore that I am going. Please remember that every Grady will float even if filled with water or capsized. Staying with your boat will make it easier for others to find you in an emergency and let someone know where you are going and when you will be back ( a float plan) :hmm