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Mandic N.,Pomorski fakultet u Splitu | Lovric I.,Poslijediplomski znanstveni studij Pomorsko pravo i pravo mora
Nase More | Year: 2011

This paper elaborates on assignment of public transport concessions in coastal liner service. The main legislation is the Law on Liner Shipping and Occasional Coastal Maritime Traffic, on the basis of which subordinate regulations were adopted regulating the terms and conditions for allocating public transport concessions in coastal liner services. Laws on Amendments and Supplements to the Law on Liner Shipping and Occasional Coastal Maritime Traffic, from 2009 and 2011, and adoption of new subordinate regulations in 2010, have to some extent changed the relations when allocating concessions, therefore, those changes are analysed in detail.

Komar I.,Pomorski Fakultet U Splitu | Lalic B.,Pomorski Fakultet U Splitu | Dobrota D.,Pomorski Fakultet U Splitu
Nase More | Year: 2010

Enviromental protection and preservation of human environment have recently become one of the most important parts of scientific advanced research. Since they primarily resolve the issues of pollution from shore, today the attention has been focused to the pollution from ships. Air pollution is a serious problem for both human health and the overall ecosystem. Emissions from ships include air pollutants, greenhouse gases and substances that destroy the ozone layer with the consequence of endangering human health and the environment. Emissions of sulfur (SOx) and nitrogen oxides (NOx), which causes acidification adversely affects the environment and human health. Emissions of volatile organic compounds (VOCs) from tankers, combined with nitrous oxide, participate in the formation of ground-level ozone, which adversely affects the health and the environment. Air pollution knows no borders and it is one of those areas that require the highest level of international cooperation. The reason for the intense need for a solution to this problem is the growing increase in air pollution emissions form ships because the emissions of stationary plants significantly reduced the adoption of various environmental laws. This problem has priority, so the international and national regulations on emission limits from ships in some countries, have been adopted especially those which are exposed to more emissions from ships, which are closer to the sea waterway.

This paper deals with the realization of the great circle navigation. In practice, the main problem occurs because the great circle is a curve on the Mercator navigation chart, which has to be broken down into a number of smaller rhumb line parts. Besides computer programs, the simplest way of realization of the great circle navigation is by using the Gnomonic chart as the great circle is a straight line on this chart. Conventional numerical and tabular methods based on spherical trigonometry are quite complicated and time consuming. In order to simplify the way of computing intermediate positions along the great circle, this paper suggests the use of the Latitude Equation of the Mid-longitude and appropriate tables based on this method. Also, using spherical trigonometry, the paper presents a way of obtaining the Latitude Equation of the Mid-longitude. Originally, the Latitude Equation of the Mid-longitude is derived without the use of spherical trigonometry.

Mitrovic F.,Pomorski fakultet u Splitu | Medic D.,Pomorski fakultet u Splitu | Bilic M.,Pomorski fakultet u Splitu
Nase More | Year: 2011

This paper shows the possibility of system dynamics implementation when hiring shipping capacity in a shipping company. Three key variables will be put in relation to demonstrate how the system works: hiring shipping capacity directly through a shipping agent; shipping agent's offer closing delay because there is not enough shipping capacity, accepting the offer with the expansion of one's own shipping capacity, hiring or buying other ships. Hiring exclusively through a shipping agent is in direct relation to the possibilities of the system expansion, which opens up the possibilities of market expansion, higher income and consequently higher net profit. Offer closing delay makes a significant link in the system because it raises the question of what is going to be gained, or lost, with the delay. The delay can mean that something is becoming incompetitive or unwanted on the market. Accepting the offer, with previous simulation of the employment optimization of the required shipping capacity, means company's business efficiency and represents it on the market as a reliable partner. The possibility of expanding by renting the shipping capacity will depend upon freight or financial possibilities as well as decisions regarding the capital investment in new ships. The model was tested in real conditions through the example of the shipping company Atlantska plovidba Inc. The programme capacity DYNAMO from 2004 is used to show the simulation results.

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