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By hartis Hydrography No Comments

History of the Hellenic Navy Hydrographic Service

After the Greek revolution of 1821, the constant changes in the geographical area of our country had as a result the “darkness” about the geographical shape of Greece. In 1817, Kefalas, a Greek sailor, published in Marseille (France), in the Greek language ,naval maps of the Mediterranean and the Aegean Αrchipelago. In the late 1800s […]

By hartis Marine Spatial Planning No Comments

Blue Economy

The Blue Economy is a transformative concept introduced by economist and businessman Gunter Pauli, often described as Green Economy 2.0. It emphasizes creating sustainable business models that leverage ocean resources responsibly, aiming to achieve 100 innovations, create 100 million jobs in 10 years, and do so with zero emissions and no waste. Pauli founded organizations […]

By hartis Navigation No Comments

The Iron Age and the Polyremes of the Geometric Period

The Polyremes of the Geometric period From the Geometric, and the archaic periods some superb examples of vase painting with representations of beautiful sleek ships have been preserved. This is the period of the development of the longship which is pictures with a mpaddingultitude of oars and sometime with more than a bank of oarsmen. […]

By hartis Navigation No Comments

The Bronze Age and the Sophisticated Ships of the Minoans

With the spreading of the use of bronze tools the shipwrights kept improving their techniques and performance and the evolution of ship-construction culminated with the Cycladic, Minoan and Mycenaean surprising planked vessels that date from the 16th to the 12th century B.C. The earliest representation of Early Bronze Age vessel date from the 3rd millennium […]

By hartis Navigation No Comments

The Scarce Evidence of the Neolithic Period

The sources for our understanding of the ancient ship For the Paleolithic and Mesolithic there are no written sources or representations of water-crafts, nor do we have any archaeological finds that can help us understand the type of crafts used and the methods of construction of our ancestors. We only rely on learned guessing and […]

By hartis Maritime Safety, Navigation No Comments

GMDSS Communication Systems

They are divided into conventional and satellite communications Conventional (terrestrial) communications: They operate in the MF, HF, and VHF frequency areas. They use the digital selective-calling (DSC), radiotelephony, radioteletypy, NAVTEX and RADAR transmitters. Satellite communications: They are conducted via the satellite systems Inmarsat and Compass-Sarsat. Inmarsat: International satellite maritime organization that operates with four geostationary […]

History of the Hellenic Navy Hydrographic Service

Blue Economy

The Iron Age and the Polyremes of the Geometric Period

The Bronze Age and the Sophisticated Ships of the Minoans

The Scarce Evidence of the Neolithic Period

GMDSS Communication Systems

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