Horizontal Illuminance of Line Source Model for Fishing Lamps around the Coastal Squid Jigging Boats.

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  • Choi Sokjin
    Department of Marine Science and Technology, Tokyo University of Fisheries
  • Nakamura Yoshihiko
    Department of Marine Science and Technology, Tokyo University of Fisheries
  • Arimoto Takafumi
    Department of Marine Science and Technology, Tokyo University of Fisheries

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  • 集魚灯による小型イカ釣り漁船周辺の海面照度分布
  • シュウギョトウ ニヨル コガタ イカ ツリ ギョセン シュウヘン ノ カイメン

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Abstract

Line source model of fishing lamps for under-surface illuminance around the Coastal squid jigging boat was calculated with a formula based on the line source model of fishing lamps, the spacial luminous distribution of HID lamp and the surface reflectance by Fresnel's law. Calculated patterns of illuminance around the boat showed a good fit to the observed patterns in the fishing ground for the boats equipped with the lamps of 30kW and 75kW. According to the model of lighting pattern, the rational spacing of neighboured boats was considered to have a formula of Y=95.2 (In A+In B)-87, when Y (m) is a interval distance, A and B (kW) are the total consumed electricity for fishing lamps of two boats, with a hypothesis of minimum under-surface illuminance for non-interference which not proceed the level of 0.01 lx.

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