1.   But tactics like these, popularized in the movies, have limited utility, since it is difficult to place the instrument packages properly.

2.   Christie-Blick and Austin need to send an instrument package down their latest bore hole, and their cruise will be over.

3.   In September, British scientists, diving in the Russian submersible Mir, are to wire the mound with six more instrument packages.

4.   It also fills up holes before instrument packages can be sent down to take measurements.

5.   The instrument package would record pressure, temperature, electrical phenomena and wind.