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SEG Annual Meeting 2000 was held in Calgary for the first time since 1977. This is only the third time the meeting has been held outside the United States.
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Instruments \ Gravity \ Gravity Meters \
Name: |
Lacoste & Romberg Underwater Meter |
Date: |
1955 |
Item Number: |
N/A |
Donor: |
N/A |
Type: |
first prototype |
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Manufacturer:
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N/A |
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Description:
This meter saved many lives, since it was the first fully
remote-controlled gravity meter ever made. Previous to this meter,
divers would take land meters in diving bells to the sea-bottom for
underwater gravity measurements. Many divers died of the bends doing in
this activity. The 1955 LaCoste & Romberg Underwater meter eliminated
the need for divers. Essentially, the underwater meter consisted of a
land gravity meter in a diving bell (right). The version shown had
leg-mounted elevators to level the meter and an analog control system
(black electronics cabinet) to operate the meter from a surface boat.
By the mid 1960's this design was slightly modified by the installation of
a smaller G-meter sensor in the diving bell. This provided space within
the diving bell for the leveling system. The outer legs were then
simplified as fixed components and the now-internal leveling system is
no longer exposed to degradation by seawater.
(text by David Chapin )
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