| 摘要 |
An anchor has a shank at whose crown end is provided a pair of main flukes defining a fluke plane. A stock is provided on the shank toward the ring end thereof and has a pair of arms extending oppositely from the shank and lying generally in a stock plane perpendicular to the fluke plane. A secondary fluke is pivotal on each of these arms between a pair of extreme positions forming an acute angle with the stock plane. In a central position the secondary flukes lie in the stock plane. In use the secondary flukes dig in first so as to pull the anchor downwardly and cause the main flukes to dig in, giving excellent grab.
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