A Ballast System for Automated Deep-Sea Ascents

2016 ◽  
Author(s):  
Matthias Golz ◽  
Florin Boeck ◽  
Sebastian Ritz ◽  
Gerd Holbach
Keyword(s):  
Environmental Impact ◽  
Environmental Contamination ◽  
Pressure Vessel ◽  
Deep Sea ◽  
Underwater Vehicles ◽  
Compressed Air ◽  
Hydraulic Pump ◽  
Unmanned Underwater Vehicles ◽  
The Past ◽  
Set Up

The efforts to discover the world’s oceans — even in extremely deep-sea environments — have grown more and more in the past years. In this context, unmanned underwater vehicles play a central role. Underwater systems that are not tethered need to provide an apparatus to ensure a safe return to the surface. Therefore, positive buoyancy is required and can be achieved by either losing weight or expanding volume. A conservative method is the dropping of ballast weight. However, nowadays this method is not appropriate due to the environmental impact. This paper presents a ballast system for an automated ascent of a deep-sea seabed station in up to 6000 m depth. The ballast system uses a DC motor driven modified hydraulic pump and a compressed air auxiliary system inside a pressure vessel. With regard to the environmental contamination in case of a leakage, only water is used as ballast fluid. The modification of an ordinary oil-hydraulic radial piston pump and the set-up of the ballast system is introduced. Results from sea trials in the Atlantic Ocean are presented to verify the functionality of the ballast system.

Commission 50: Protection and Identification of Existing and Potential Astronomical Observational Sites

1997 ◽  
Vol 23 (1) ◽  
pp. 45-46
Author(s):  
S. Isobe
Keyword(s):  
Environmental Impact ◽  
Cambridge University ◽  
Previous Period ◽  
The Past ◽  
Set Up

During the past triennium many efforts have been made by individual members and Commission 50 to keep a good observational environment, along the lines set up by the previous Commission 50 president, P. Murdin. The number of commission members is 65, which is unchanged from the previous period. Since our problems become more severe year by year and are connected directly to the activities of all observational astronomers and indirectly to those of all theoreticians, the commission should have made an effort to increase the number of active members.The book “Adverse Environmental Impact on Astronomy” edited by D. McNally was published by Cambridge University Press in 1994. This book is a direct output of a meeting held by UNESCO, ICSU and IAU at the headquarters of UNESCO in Paris from June 30 to July 2 in 1992, and shows nearly all the problems which we are facing.

scholarly journals IDENTIFICATION OF RISKS IN THE COURSE OF MANAGING THE DEEP SEA ARCHEOLOGICAL PROJECTS USING MARINE ROBOTICS

2016 ◽  
Vol 6 ◽  
pp. 59-64 ◽  
Author(s):  
Anatoly Nadtoshy
Keyword(s):  
Risk Factors ◽  
Deep Sea ◽  
Human Factor ◽  
Theoretical Foundation ◽  
Underwater Vehicles ◽  
Financial Risks ◽  
Archaeological Research ◽  
Marine Robotics ◽  
Unmanned Underwater Vehicles

An analysis is conducted of the basic risks that occur when managing the projects of deep-sea archeological research. It is proposed to consider possible risks of such projects in the form of a general set of risks that contains subsets of the identified and unidentified risks. Based on the generalization of existing experience of conducting underwater archaeological research and with regard to the peculiarities of their execution by using TV-controlled unmanned underwater vehicles, the main risks of such operations are identified. A classification of risk factors is proposed, which takes into account weather and hydrological conditions in the area of operations, peculiarities of the underwater situation, technological and technical provision of underwater archaeological research, possible obstacles from the navigation in the explored area and errors in geographical coordinates of fulfilled work, as well as the human factor. Additionally, environmental, organizational and financial risks, which the project team is aware of, are defined as directly related to planning the projects of deep-sea archeological research. A generalized risk register is developed of the projects' deep-sea archaeological studies as theoretical foundation for designing the models of risk management and their quantitative evaluation when planning financial and temporal resources for such projects.

Preliminary Sea-trial of the Deep-sea Unmanned Underwater Vehicles HEMIRE and HENUVY

OCEANS 2006 ◽  
2006 ◽  
Author(s):  
P. M. Lee ◽  
B. M. Jun ◽  
C. M. Lee ◽  
H. T. Choi ◽  
J. H. Li ◽  
...  
Keyword(s):  
Deep Sea ◽  
Underwater Vehicles ◽  
Unmanned Underwater Vehicles ◽  
Sea Trial

Analysis of Environmental Impact of Deep Sea Development of Mineral Deposits

2019 ◽  
Vol 145 (3/2019) ◽  
pp. 92-97
Author(s):  
Yu.V. Kirichenko ◽  
A.S. Kashirskiy ◽  
G.S. Ivaschenko
Keyword(s):  
Environmental Impact ◽  
Deep Sea ◽  
Mineral Deposits
Sign in / Sign up

Export Citation Format

Share Document