Journal of Marine Technology and Environment 2017 Vol. 1

The main focus of this article is the development and use safe, easy mooring system, with reduction of costs and energy. The operation of mooring a ship at port is extremely important and dangerous. It is very important to use a safe system for mooring, not to put people life’s in danger or even the ship. By using an improved system like Shore Tension we can reduce the costs of mooring for charters and owners, save people energy, save time. Quality of the lines used for mooring is very important, because with a damage one or a mooring line of poor quality, can appear accidents or even casualties. Improved Shore Tension System can be in future, the new system of mooring: safe, clean and easy.

Bayes' theorem is one of the fundamental theorems of probability, which determines the probability of events and objects belonging to a certain group. Reliability is considered in some sense a probability. To determine some characteristics of reliability, it is possible to use Bayes formula. Bayes' theorem can be used to review the likelihood of a specific event that already happened, it can be repeated again. Some examples of application of Bayes' theorem in the technical field are presented in this paper, attempting to explain why this theorem is called the inverse probability law: we can use condiţional probability to make a prediction in reverse and to improve our prediction of events.

The Mathcad interface allows users to combine a variety of different elements (mathematics, descriptive text, and supporting imagery) into the form of a worksheet, which is naturally readable. Because the mathematics are core to the program, the math is inherently live, dynamically recalculating as upstream values are altered. This allows for simple manipulation of input variables, assumptions, and expressions, which in turn update in real-time. The paper proposes the design by using Mathcad program of V-belt drives for speed reducer with a spur wheel stage.

Unloading of hydrocarbons into the marine environment has a signifiant economic impact for both the activities performed on the shores and exploiting the resources of the sea. In this context it is necessary to adopt a strategy and a national system of intervention to respond quickly and effectively in the event of a disaster caused by an accidental oil pollution in the area of the continental shelf or in the Romanian coastal belt. Quick resolution of such problems, as a result of work techniques developed as a result of simulations, reduces major negative consequences. In the present work was chosen using two simulation programs, HYSPLIT and ADIOS,both developed by NOAA, for forecasting events due to oil spills of the Black sea romanian coast and the choice of methods of remediation For simulations were used two types of oils: Abu-Dhabi and Horcon. The results of simulatios were: visualizing graphs oil removal, the charts of evaporated oil, the oil dispersing proces, the content of water in oil, the concentration of benzene in air. HYSPLIT and ADIOS programs for simulation the processes of removal oil discharged into the sea permit: making a prognosis; evaluation methods of remediation; the possibility of taking measures in advance to protect areas located at shore.

I presented the validation of diver thermal balance equation in subsea hyperbaric environment at diving with air, in a previous paper. The same equation was validated, at saturation diving using Heliox breathing mixture, in the simulator of Laboratory Hyperbaric Diving Center. The subjects were separated into two groups of four: the first group dived in saturation with Heliox at 60msw “stage depth” and the second one at 30msw. I calculated, with equation (1.1), theoretically temperatures divers, after sinking into warm water (20 0C) and into cold water (17 0C). At the end diving temperatures were measured each subject, for each scenario diving (depth, water temperature, stationary time, thickness suit, etc.). Theoretically temperatures were compared with those obtained experimentally and the differences between theoretical and real values were 1 0C. The mathematical proposed model is valid for Heliox saturation diving in wet hyperbaric environment, up to 60 msw.

Different physical phenomena can be studied with the help of numerical programs. These programs are highly used in academic institutions for a better understanding of the phenomenon itself. A good correspondence between analytical representation and numerical representation is presented for different potential flows. The paper also presents a practical usage of potential flow when investigating the performance of an unconventional system that uses Flettner rotor for helping ship propulsion. The simulation, performed with CFD (Computational Fluid Dynamics) was made for different working conditions by varying the incidence angle.

This paperwork is designing a suspended 50mx6m suspended crossing over a channel or a small river considering not only the design load but the response spectrum too.

This study was carried out starting from a real need: the possibility to create a fast rescue ship, able to operate in shallow waters in environments with explosive potential. That why, the idea of the designers was to use aluminium alloys in order to obtain a light boat. The hosed material is AL5083H116.

Cybernetics consider the machines, living organisms and sea society as a organizing comprehensive form (system) – sea risky system that naturally historical or artificially reaches a certain level of organization according to relevant quality fixed structure or level of complexity. Basic laws and principles of cybernetics are inextricably linked to the reliability of functioning cybernetic systems. Cybernetics (cyber society) consider the objects as a system, not as a control system of a general nature, but as a system of defined set of general and specific structural and functional properties (presence in the world of living systems and social structures).

In order to maximize the design of the Controllable Pitch Propellers for low acoustic signature is necessary to analyse more aspects the general features of propeller and the effect of air emission, the effect of cavitation by using different computer programme which can stimulate a lot of parameters developed on the model on scale and on the full scale model. The result made possible a new way for improvement of design techniques to obtain more and more less noisly Controllable Pitch Propellers.

This paper presents an original procedure for estimating the propulsion of small scale hydrofoil ships. This procedure has enabled the development of a computer program that can predict both those types of ship propulsion regime imposed at a quasi-stationary speed and the march regime on wings. The calculation software obtained may serve to design any type of hydrofoil ship. The input data are read in a network that has access throughout the development of the program. In the end, the program outlines for the two march regimes of the ship which the study has been carried on, the drag resistance curve depending on the speed.