Abstract: The present helicopter deck makes use of a passive fire-fighting system. Extruded aluminum beams on a base support an upper platform for supporting the helicopter. The support beams provide a space between the base and the upper platform. The upper platform is a grating, which permits fuel to pass through it. The support beam support batts of thin, spaced strips of high-heat conductive material below the upper platform. The support beams also supports deck plates below and spaced from the batts. The material of the batts conducts localized heat from one location of the batts to a more even, lower temperature spread generally through the batts. The deck plates catch fuel that passes through the batts and slopes to cause the fuel to flow away from the deck.