In spite of the negotiations initiated in 1972 Poland and Denmark have not so far managed to effect a delimitation of their maritime areas between Bornholm and Polish coast. This situation constitutes the longest lasting case of unsettled maritime boundary in the Baltic Sea. Even though both countries are parties to 1982 United Nations Convention on the Law of the Sea, they present different interpretation of art. 74 of the Convention, which states that the delimitation of the exclusive economic zones of the States with opposite coasts „shall be effected by agreement on basis of international law, as referred to in Article 38 of the Statute of the International Court of Justice, in order to achieve an equitable solution Consequently, Denmark considers the disputed area should be divided on the basis of median line. On the contrary, Poland invoke the international judgements and the practice of the States and indicates that boundary should be determined in accordance with the equitable principles, with regard for an existance of several special cicumstances, namely geographic and geophysical factors and proportionality calculations. Since the postures of the parties involved are overlapping, there exists south and southeast of Bornholm a disputed area of 3 500 km2, similar to this one existing between Gotland and the USSR coast before 1988. The relevant acts of national legislations of either Poland or Denmark illustrate these different claims. Nevertheless, during the recent negotiations round the parties agreed to create a special commitee of experts in aim to examine all the possible boundary lines. This fact confirms that it still may be possible for both countries to reach an agreement in bilateral negotiations.

The Distributed Ledger Technology (DLT) is a peer-to-peer model of sharing data among collaborating parties in a decentralized manner. An example of DLT is a blockchain where data form blocks in an append-only chain. Software architecture description usually comprises multiple views. The paper concentrates on the Deployment view of the DLT solution within the 1+5 architectural views model. The authors have proposed Unified Modeling Language (UML) extensibility mechanisms to describe the needed additional semantic notation to model deployment details. The paper covers both the network and node levels. The proposed stereotypes and tagged values have enriched UML Deployment diagram. We have gathered those modeling elements in dedicated UML Profile for Distributed Ledger Deployment. We have applied the profile to model Deployment view of a renewable energy management system that uses R3 Corda framework. The system records information about inbound and outbound energy to/from renewable energy grid.