Abstract
A 36 kc/s underwater acoustic echo-ranger, fitted to R.R.S. `Discovery II' for work on fish detection problems, has also proved to be a valuable tool for marine geological investigations. The axis of the acoustic beam is perpendicular to the fore and aft line of the ship and may be rotated from the horizontal to the downward vertical. Stabilization is provided against the roll of the ship. Beam width and side lobe patterns are adjustable with minimum widths, between 3 dB points, of 1.3° in plan and 12° in elevation (beam axis horizontal). The recorder provides a range of 800 yards and scanning is achieved by steaming the ship past the features to be investigated.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
