Marine Air Horn– Coast Guard Approved Boat Horn for Safety & Fog Alerts | Loud 120 dB Sound Blast airhorn Reaches ½ Mile | Compact 1.4 oz mini air horn for boat, Sailing, Kayaking & Outdoor Use. 𝐂𝐎𝐀𝐒𝐓 𝐆𝐔𝐀𝐑𝐃 𝐀𝐏𝐏𝐑𝐎𝐕𝐄𝐃 & 𝐑𝐄𝐂𝐎𝐌𝐌𝐄𝐍𝐃𝐄𝐃:Stay compliant and safe on the water.