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Inspection and maintenance planning of cargo handling and storage systems on ships of different purposes
No full textRad objedinjuje ključne aspekte sustava prihvata i sustava skladištenja tereta na brodovima različite namjene, s posebnim naglaskom na tehničke zahtjeve, klasifikacijske kriterije te strategije održavanja ovih sustava. U suvremenom pomorstvu, globalna trgovina ovisi o efikasnosti i sigurnosti brodskih operacija te pravilno planiranom i provedenom održavanju opreme. Detaljno su analizirane karakteristike tankera, kontejnerskih i RO-RO brodova, pri čemu se ističu specifične tehničke komponente poput rampi, dizalica, vodilica i sustava za učvršćivanje tereta. U kontekstu sve veće složenosti brodskih sustava i rastućih tržišnih zahtjeva, rad pobliže istražuje ulogu preventivnog i korektivnog održavanja, važnost vođenja dokumentacije, periodičnih pregleda te uključivanje digitalnih tehnologija poput PMS sustava, senzora, NDT metoda i umjetne inteligencije. Sustavno održavanje produljuje životni vijek opreme, smanjuje ekološke rizike i omogućuje optimizaciju troškova, što u konačnici potvrđuje da je kvalitetno održavanje temelj za sigurnu, učinkovitu i održivu brodsku industriju, u skladu s globalnim standardima i budućim tehnološkim trendovima.The paper brings together the key aspects of cargo handling and storage systems on vessels of various types, with a particular focus on technical requirements, classification criteria, and maintenance strategies. In modern maritime transport, global trade depends on the efficiency and safety of ship operations, as well as on properly planned and executed equipment maintenance. The study provides a detailed analysis of tankers, container ships, and RO-RO vessels, highlighting specific technical components such as ramps, cranes, cell guides, and cargo securing systems. These regulations and standards define the technical requirements for ship safety and maintenance. In the context of increasing complexity of ship systems and rising market demands, the paper examines the role of preventive and corrective maintenance, the importance of documentation, periodic inspections, and the integration of digital technologies such as PMS systems, sensors, NDT methods, and artificial intelligence. Systematic maintenance extends equipment lifespan, reduces environmental risks, and enables cost optimization, ultimately confirming that quality maintenance is a foundation for a safe, efficient, and sustainable shipping industry in line with global standards and future technological trends
The impact of contamination on the air and gas sides of a turbocharger on the main parameters of an auxiliary engine
No full textU ovom radu analiziran je utjecaj zaprljanosti zračne i plinske strane turbo-puhala
na rad pomoćnog brodskog motora. Kroz provedena mjerenja pratile su se promjene tlaka
ispirnog zraka, temperature ispušnih plinova i temperature ispirnog zraka pri različitim
stupnjevima zaprljanosti. U radu su opisane metode održavanja i čišćenja turbo-puhala, s
naglaskom na važnost redovitog održavanja za pouzdan rad motora. Rezultati su pokazali
da zaprljanost negativno utječe na učinkovitost motora, povećava potrošnju goriva i
podiže temperature ispušnih plinova.This thesis analyzes the impact of fouling on the air and gas sides of the
turbocharger on the operation of an auxiliary marine engine. Through conducted
measurements, changes in the intake air pressure, exhaust gas temperature, and intake air
temperature were monitored at different levels of fouling. The thesis also describes
maintenance and cleaning methods for the turbocharger, emphasizing the importance of
regular maintenance for reliable engine operation. The results showed that fouling
negatively affects engine efficiency, increases fuel consumption, and raises exhaust gas
temperature
Design of a Conceptual Underwater Wireless Communication System Integrating Electromagnetic and Optical Technologies
No full textUnderwater wireless communication is pivotal for advancing maritime technology, supporting applications such as underwater exploration, autonomous underwater vehicles (AUVs), diver communication, search-and-rescue operations, and military systems. Traditional acoustic communication systems, while effective over long distances, are constrained by low bandwidth and high latency, limiting their suitability for data-intensive operations. Electromagnetic (EM) and optical communication technologies offer promising alternatives, providing higher data rates, greater bandwidth, and lower latency, but face challenges such as signal attenuation, scattering, and environmental interference. To address these challenges, this paper explores the potential of an integrated wireless communication and navigation system combining EM and optical technologies. Initial experimental measurements of EM wave propagation in freshwater provided valuable insights into signal attenuation and frequency-dependent performance, demonstrating the feasibility of overcoming attenuation in such environments. Building on these observations, this paper proposes a conceptual system comprising three interconnected segments: a space segment utilizing the Galileo High Accuracy Service (HAS) for precise GNSS signals, a waterline segment processing and transmitting GNSS-like signals, and an underwater segment facilitating navigationand communication for divers and AUVs. Preliminary findings highlight the potential of combining EM and optical technologies for reliable, near real-time underwater wireless communication. Future work will focus on extending functionality, validating the system in saltwater environments, and refining the design for practical deployment
Organization and update of technical documentation on the ship
No full textOrganizacija i ažuriranje tehničke dokumentacije na brodu su ključni za sigurnost i učinkovitost. Proces obuhvaća identifikaciju, organizaciju i redovito ažuriranje dokumenata kao što su crteži i specifikacije. Praćenje promjena i jasno definirani procesi su od vitalne važnosti za održavanje točnosti dokumentacije. Obuka osoblja o procedurama ažuriranja igra ključnu ulogu u uspješnosti procesa. Korištenje suvremenih softverskih alata olakšava administraciju i osigurava brzu dostupnost ažurirane dokumentacije. Konačno, sveobuhvatna strategija za upravljanje dokumentima pridonosi učinkovitom funkcioniranju broda.Organization and updating of technical documentation on the ship are crucial for safety and efficiency. The process involves identification, organization, and regular updating of documents such as drawings and specifications. Tracking changes and clearly defined processes are vital for maintaining document accuracy. Personnel training on updating procedures plays a key role in the success of the process. The use of modern software tools facilitates administration and ensures fast availability of updated documentation. Finally, a comprehensive strategy for document management contributes to the efficient functioning of the ship
PUP_ENGRI_HRZZ_UIP-2019-04-1576_završno
No full textPlan upravljanja istraživačkim podacima za projekt ENGRI (ENGLESKE RIJEČI U HRVATSKOME JEZIKU: IDENTIFIKACIJA, AFEKTIVNO-SEMANTIČKO NORMIRANJE I ISPITIVANJE KOGNITIVNE OBRADE BIHEVIORALNIM I NEUROZNANSTVENIM METODAMA), financiran od strane Hrvatske zaklade za znanost, za razdoblje nakon završetka projekta
Economic Governance in Maritime Affairs
No full textThe paper presents results of the research focused on analysing potential and institutional examples
of the application of economic governance in maritime affairs. We performed literature review of
the wider field of economic governance and the narrower field of economic governance in maritime
affairs for two separate time periods, 1955-2023 and 2009-2023. Based on the presented literature
analysis, multiple complementary research perspectives had been identified that can be aggregated
into four main research perspectives on economic governance in maritime affairs: socio-ecological,
environmental, international and regional. To provide the theoretical foundations for applying economic
governance to maritime affairs, the conceptual features, scope, and role of the economic governance
approach have been analysed. The institutional perspective on economic governance and its potential
for application to maritime affairs has been examined. The analyse of the interconnections of the
theoretical background with the institutional framework has been performed on the level of European
Public Policies in maritime affairs. The analysis established the foundational assumptions necessary
for the practical implementation of economic governance approaches within the field of maritime
affairs. European concept of sustainable governance of the blue economy has been analysed together
with the Blue Growth concept in consistency with the institutional framework of maritime economic
governance, focusing on comprehensive and interrelated economic governance approaches while
utilising four aggregated research viewpoints on economic governance in marine affairs
Hydraulic and pneumatic systems of the Schottel type marine propulsion
No full textOvaj rad opisuje hidrauliku i pneumatiku brodskog pogonskog sustava tipa Schottel, njegove dijelove i upravljanje istim kroz nekoliko primjera. Schottel je propulzor tipa azimut, Z-drive, dizajniran sa horizontalnim ulaznim i izlaznim vratilom te može biti i sa zakretnim krilcima. Azimut propulzija je smještena u nosače/kućišta koja se horizontalno mogu rotirati 3600 u bilo kojem smjeru čineći kormilo suvišnim. Prednost takvog sustava je veća upravljivost od fiksnog sustava propelera i kormila, povećana učinkovitost uz manju potrošnju goriva. Ovaj sustav ima određene prednosti i kvalitete i sve više se koristi u svim vrstama plovila u cijelom svijetu.This work describes the hydraulics and pneumatics of the Schottel-type marine propulsion system, its parts and its management through several examples. Schottel is an azimuth type thruster, Z-drive, designed with a horizontal input and output shaft and can also be eqipped with controllable pitch propeller. Azimuth propulsion is housed in brackets/housings that can be rotated horizontally 3600 in any direction, making the rudder redundant. The advantage of such a system is greater maneuverability than a fixed propeller and the rudder system, increased efficiency with lower fuel consumption. This system has certain advantages and qualities and it is increasingly used in the all types of vesseld throughout the world
Comparative analysis of chartering in nautical tourism in the Republic of Croatia and competitive countries of the European Union
No full textNautical tourism is an economic phenomenon that has played an increasingly important role in the economic growth of the coastal states of the European Union in recent decades. Strictly speaking, nautical tourism is a part of tourism that, according to data from 2021, accounts for as much as 15.9% of the total GDP of the Republic of Croatia. Despite these high numbers, Croatia lags behind European countries such as France, Spain and Italy due to its relatively weak nautical tourism offer. Considering the climatic and spatial conditions and the long coastline rich in relief, Croatia still has a lot of unused potential for the development of nautical tourism. Nautical charter is one of the most underdeveloped activities of nautical tourism, especially in the area of luxury charter, which refers to the rental of luxury yachts. Daily and multi-day charters are more common in Croatia, but the lack of differentiation of the fleet and inadequately trained personnel make it impossible for the services offered to meet the demand. This is particularly evident in the period following the Covid 19 pandemic, which has greatly changed the economic and social point of view of boat users.
The aim of this scientific article is to compare the nautical tourism of the Republic of Croatia and selected countries of the European Union, with special attention to the nautical charter, in order to gain insight into the current state of the market and identify advantages and disadvantages. of charter tourism to enable the further development of the Republic of Croatia in the above-mentioned field. Through the collected statistical data the prices and quality of the nautical charter service in Croatia and competing countries of the European Union, the results were compared and analyzed. Considering the affordability of renting motor and sailing yachts, the competitiveness of the Republic of Croatia on the European market is undeniable. However, this work also examines whether the existing infrastructure and superstructure can support the potential development of nautical charter in the Republic of Croatia
Tachograph - Monitoring Device for Greater Road Traffic Safety
No full textThe tachograph, as a monitoring device, will play a key role in improving road traffic safety. This
sophisticated device records and tracks driver activities, including working hours, rest and breaks,
helping to ensure compliance with driver working conditions regulations. Accurate driving time
tracking reduces the risk of driver fatigue and potential road accidents.
Speed monitoring and driving performance analytics provided by the tachograph contribute to
increased safety. Along with the warning system, tachographs enable quick reactions to potential risks,
providing an additional layer of protection for drivers and other road users. In addition, integration
with technologies such as GPS enables efficient route tracking, route optimization and reduction of
transportation costs.
Taking into account all these aspects, the tachograph is not only a means of monitoring, but also a
key partner for companies that want to improve driver safety, reduce risks on the roads and achieve
efficiency and compliance with road traffic regulations
GPS signal structure
No full textZavršni rad istražuje strukturu GPS signala, oslanjajući se na širi kontekst satelitske
navigacije. U uvodnom dijelu definiraju se osnovni pojmovi i preduvjeti za satelitsku
navigaciju, uključujući zajednički geoprostorni i vremenski sustav, te konstantnu brzinu
širenja navigacijskih signala. Dalje se analiziraju temeljne usluge satelitske navigacije i
različiti GNSS sustavi poput GPS-a, GLONASS-a, Galileo-a i BeiDou-a, kao i regionalni
sustavi. Detaljno se razmatraju segmenti satelitskih navigacijskih sustava. Središnji dio rada
fokusira se na GPS navigacijske signale, uključujući strukturu signala, val nosilac, kodirane
signale i navigacijsku poruku. Također se obrađuje princip satelitskog određivanja položaja
i ukupni proračun pogreške položaja s posebnim naglaskom na korisničku razdiobu
pogrešaka. Naposljetku, rad proučava primjene GNSS sustava u različitim prometnim
sektorima i drugim područjima. Zaključni dio donosi ključna mišljena i razmatranja.The bachelor thesis investigates the structure of GPS signals within the broader context
of the satellite navigation. The introduction defines basic concepts and prerequisites for
satellite navigation, including a common geospatial and temporal system, and the constant
speed of navigation signal propagation. It further, thesis analyses the fundamental services
of satellite navigation and various GNSS systems such as GPS, GLONASS, Galileo, and
BeiDou, as well as the regional systems. The segments of satellite navigation systems are
examined in detail. The main part of the thesis focuses on GPS navigation signals, including
signal structure, carrier wave, coded signals and navigation messages. It also addresses the
principle of satellite positioning and the overall estimation of the positioning error with
underline on the user error distribution. Finally, the thesis discusses the applications of
GNSS systems in various transportation sectors and other fields. The conclusions summarize
the key opinions and considerations