Fig. 11.19 a) The Benthos-manufactured sediment corer designed tor DEEP QUEST (Benthos Corp.) 



b) Plastic water samplers developed by WHOI. The sampler is rotated by the manipulator to open the lead-weighted doors and then purged by moving it through the water. Further 

 rotation dosses the flap valve doors to collect a water sample (WHOI) 



c) An oii-filled compass attached to DEEPSTAR 40O0's manipulator provides directonal information to augment observations of the bottom 



d) Manufactured by HYCO to cut a sunken tugboat's anchor chain, the hydraulic cutter attached to the manipulator ot PISCES I is capable of exerting 60,000 pounds of pressure on 

 its case-hardened steel blade. (HYCO) 



567 



