The first technology to replace weighted lines for making detailed measurements of the contours of the ocean floor was:
A) echo sounders
B) satellites
C) bathyscaphes
D) submersibles

Question

Quizplus · Accepted Answer

Echo sounders were the first technology to replace weighted lines for making detailed measurements of the contours of the ocean floor. They use sonar to measure the depth of the ocean floor and can produce detailed maps of the seafloor's topography. Satellites, bathyscaphes, and submersibles have also been used to study the ocean floor, but echo sounders were the first major technological advancement in this area.

The First Technology to Replace Weighted Lines for Making Detailed