Petty Officer 1st Class Kevin Spratt, a boatswain's mate stationed aboard the Coast Guard Cutter SPAR, gives a demonstration for the practical use of his hammer hook invention in Kodiak, Alaska, April 12, 2018. The hammer hook combines two commonly used tools on the buoy deck, a chain hook and a maul, thus eliminating the need for crew members to manage two separate tools. U.S. Coast Guard photo by Petty Officer 3rd Class Lauren Dean.