Section 1915.165 - Ship's deck machinery(a) Before work is performed on the anchor windlass or any of its attached accessories, the employer shall ensure that the following steps are taken: (1) The devil claws (also known as chain stoppers) shall be made fast to the anchor chains.(2) The riding pawls shall be in the engaged position.(3) In the absence of devil claws and riding pawls, the anchor chains shall be secured to a suitable fixed structure of the vessel.47 FR 16986, Apr. 20, 1982, as amended at 67 FR 44545 , July 3, 2002