| 摘要 |
1,228,100. Otterboards. J. MORGERE. 18 Nov., 1969 [23 Dec., 1968], No. 56411/69. Heading A1A. An otterboard a suitable both for bottom and pelagic trawling is dished and substantially of oval shape and is provided with a longitudinal rib c with towing warp attachment points d, d 1 and net brace points e, e 1 for bottom and pelagic trawling respectively. Ballast b is provided and optionally d and d 1 are located approx. 1/3 and ¢ the board length from the front and e and e 1 are approx. “ and 1/5 the board length from the rear respectively. |
