441 / | HD | BUOYS, RAFTS, AND AQUATIC DEVICES |
1 | DF | BUOY {6} |
21 | DF | .~ Having means to control attitude or position {3} |
23 | DF | .~.~ Tether {1} |
24 | .~.~.~ Having playout means {3} | |
25 | DF | .~.~.~.~> Having means to control playout |
26 | DF | .~.~.~.~> Reel for tether |
27 | DF | .~.~.~.~> Having seat for buoy |