ing the deng was done -ewhat high ‘he tug was stermination. 3 obtained aSaleEE ul intents encountered at depths of 100 feet. These meters were hand-carried by divers using self-contained underwater breathing apparatus and proved to be highly successful. Diving monitors using the instruments reported that the meters sere easy to handle and to read while under water. 114 total he Umbrella the monia was quite lowing deto18 were pronpling withH+45 min. de an actual the general y alongside 1 the TU-6 3 ‘mation conroved, in . due tothe avy ships , ter Fig, Su ae shot )} feet from ; ‘om .Quince $i va Tilefirtaba > i. arene wt and a per- y 1,600 people operations. r rapid dissihots, and alvithout hazard 7& rc Pinex and 4 hr delay i. ation measur- a cables and i ; lb atid s IG Otte st cand pressures aed Et Agneter: ‘alties Co.,, - 15 -