automatic weather ocean surface "NOMAD" station buoy bridle swivel thimbled eye and shackle thimbled eye 5,000' and shackle 3/4" dacron cable 10,000' 3/4" polypropylene cable thimbled eye shackle and 3/4" chain 500–1b anchor 1-1/4" chain Figure 2. NOMAD anchorage system (Smith, 1965). 1,875 fathoms