NDLI: Handling and towing the long range side scan sonar vehicle "GLORIA" on R.R.S. "Discovery"

Content Provider	IEEE Xplore Digital Library
Author	Edge, R.H.
Copyright Year	1974
Description	Author affiliation: Inst. of Oceanographic Sciences, Wormley, Surrey, England (Edge, R.H.)
Abstract	The paper considers the special problems associated with handling, launching, towing and recovery of the large side scan sonar vehicle known as "G.L.O.R.I.A.", (Geological Long Range Inclined Asdic), using R.R.S. "Discovery".(1) (2) A general specification and description of the vehicle is given, together with the requirements of the towing arrangement to fulfill the acoustic requirements of stability. Handling such a vehicle, (which weighs 6,6 tonnes in air), involved the design and installation of a special double fall lifting Davit , with controlled tensioning in the falls. A special cable winch for the large armoured multi-way electric cable was also installed to accomodate the 366 metres of 46m.m. diameter cable required. Acoustic requirements dictated that the vehicle should be towed some 300 metres behind the ship at a depth of approx. 120 metres, and that its stability in pitch and yaw should be of the order ofThe towing arrangement had therefore to be developed to decouple the motion of the ship from the vehicle. Initially, ascale model of "GLORIA" was manufactured, with full instementation to obtain a measure of its stability. This was towed from the "Discovery" in representative sea conditions and the towing system proved. The first towing arrangement on the full scale vehicle was found to be rather complicated to rig, and gave excess wear on the accumulator ropes used. A much simpler system was evolved which has been used latterly with great success. Hydrodynamic stability of the vehicle when towing is almost completely controlled by the towing arrangement. Small yaw rudders are fitted to make small corrections in yaw from an inbuilt yaw gyro, and the pitch attitude may be controlled by "blowing" or flooding either of the three separate compartments of the vehicle. Both launching and recovery of the vehicle requires the services of a team of skin divers-these operations therefore require relatively calm conditions - but the vehicle can be towed operationally in quite rough sea conditions.
Starting Page	307
Ending Page	315
File Size	1036036
Page Count	9
File Format	PDF
DOI	10.1109/OCEANS.1974.1161399
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1974-08-21
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Marine vehicles Frequency Sonar equipment Stability Attitude control Floods Skin Sea floor Acoustic transducers TV
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

10. Site survey for site 410, an example of the use of long-range side-scan sonar (gloria).

Autonomous interpretation of side scan sonar returns

"Inverted" acoustic navigation system also measurers sound speed at towed vehicle

Side scan sonar image segmentation and feature extraction

Calibration Schema for a Long-Range, Fishery-Research Side Scan Sonar

Fuzzy c-means image segmentation of side-scan sonar.

Feature tracking and depth estimation in front-scan sonar image sequences

Modeling acoustic volume backscatter from two shallow-water marine environments by side-scan sonar

A Synopsis Of Seamarc II Side-scan Processing Techniques

Handling and towing the long range side scan sonar vehicle "GLORIA" on R.R.S. "Discovery"

Similar Documents

10. Site survey for site 410, an example of the use of long-range side-scan sonar (gloria).

Autonomous interpretation of side scan sonar returns

"Inverted" acoustic navigation system also measurers sound speed at towed vehicle

Side scan sonar image segmentation and feature extraction

Calibration Schema for a Long-Range, Fishery-Research Side Scan Sonar

Fuzzy c-means image segmentation of side-scan sonar.

Feature tracking and depth estimation in front-scan sonar image sequences

Modeling acoustic volume backscatter from two shallow-water marine environments by side-scan sonar

A Synopsis Of Seamarc II Side-scan Processing Techniques

Handling and towing the long range side scan sonar vehicle "GLORIA" on R.R.S. "Discovery"