Includes: 1: A Martin drawing showing the complete vehicle sans payload section, with inboard view of the first and second stages and transstage. 18067 x 4577 pixels. 2: Martin layout drawing of the core vehicle with numerous cross-sections. 22962 x 4332 pixels 3: United Aircraft drawing 4A0020, Rocket Motor - Flight Configuration.
NOAA scientists primarily use sonar to develop nautical charts, locate underwater hazards to navigation, search for and map objects on the sea floor such as shipwrecks, and map the sea floor itself. There are two types of sonarâactive and passive.
The rst active sonar designed in the same way modern sonar is, was invented and developed as a direct conse-quence of the loss of Titanic in 1912, where the basic requirement was to detect icebergs in 2 miles distance. Underwater sound is used both by whales and dolphins (see Fig. 1) for communication and echolocation.