| 摘要 |
PURPOSE:To prevent a top mark surface from being subject to an electrostatic charge as well as to keep off any trouble or the like in a control circuit for lighting equipment, by forming the top mark surface to be attached to a buoy with synthetic resin, while grounding the surface with a wire or the like. CONSTITUTION:A surface of a top mark body 1 formed with synthetic resin or its film is ground with a ground wire 2 using stainless steel, an aluminum alloy, a copper alloy and the like at regular intervals in vertical directions by both top and bottom setting parts 3 and 4. Electrostatic charge at the top mark surface attributable to atmospheric static electricity is prevented from occurring, while a blinker control circuit or the like for lighting equipment housed inside is prevented from being damaged and/or troubled by discharge of an electrostatic charge.
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