Three-dimensional CFD studies of the mean airflow over various research ships and a generic tanker/bulk carrier have been performed. The bias in the wind speed measurements is highly dependent upon anemometer position and ship shape. Even for anemometers in well-exposed locations on research ships the wind speed may be biased by about 10 %. Anemometers located above the bridge of tankers/bulk c...

The decomposition of nonlinear output feedback control into an observer and a state feedback control is an open problem. A solution for dynamic positioning of ships has been proposed in 1] and 2], where an observer-based back-stepping method is used. This note points out that the observer design in 1] and 2] does not cover unstable ship dynamics and suggests a remedy for an extended class of sh...

The Bosphorus (Istanbul Strait) that connects the continents of Europe and Asia is too complex due to geographical conditions and have a continuously increasing maritime traffic. The length of the Bosphorus which connect the Black Sea and the  Marmara Sea is 29.9 km. The number of ships (Tanker, general Cargo and bulk carrier) passing through the Istanbul strait was recorded as 42553 in 2016 an...

Underwater radiated noise measurements for seven types of modern commercial ships during normal operating conditions are presented. Calibrated acoustic data (<1000 Hz) from an autonomous seafloor-mounted acoustic recorder were combined with ship passage information from the Automatic Identification System. This approach allowed for detailed measurements (i.e., source level, sound exposure level...

Chemical tanker ships are one of the most used types in maritime market. The use chemical tankers national and international waters is increasing day by day. Maritime businesses shipowners prefer to lease that active market for some time instead building owning new ships. Due increase preferences, it has been seen an important issue determine selection carry this type cargo different criteria. ...

In 2006, we used the U.S. Coast Guard's Automatic Identification System (AIS) to describe patterns of large commercial ship traffic within a U.S. National Marine Sanctuary located off the coast of Massachusetts. We found that 541 large commercial vessels transited the greater sanctuary 3413 times during the year. Cargo ships, tankers, and tug/tows constituted 78% of the vessels and 82% of the t...

Dünyanın %71'i denizlerle kaplıdır. Denizcilik, sunduğu ekonomik maliyetler nedeniyle uluslararası ticari taşımacılıkta en çok tercih edilen sektördür. Enerji, tıbbi ekipman, ilaç, gıda ve benzeri hammadde ürünlerin nakliyesi çoğunlukla deniz yoluyla yapılmaktadır. Bu çalışmada; Denizcilerin bilgi birikimleri ile çalışma performansları gemiye uyumları arasındaki ilişkinin incelenmesi amaçlanmak...

Under suitable assumptions, the nonlinear dynamics of surface gravity waves can be modeled by the one-dimensional nonlinear Schrödinger equation. Besides traveling wave solutions like solitons, this model admits also breather solutions that are now considered as prototypes of rogue waves in ocean. We propose a novel technique to study the interaction between waves and ships/structures during ex...

EXTENDED ABSTRACT Commercial marine vessels range in size from small fishing boats (20-30 meters in length) to extremely large tanker ships (>300 meters in length). These ships almost without exception use diesel engines for propulsion and auxiliary power generation. The larger ships, comprising bulk carriers, tankers and container carriers, utilize slow-speed diesel (SSD) engines that produce ...

Abstract Ship classification in SAR images has attracted much attention by researchers. In this paper, a target method for three commercial ships (container ships, bulk carriers and oil tanker) is proposed analyzing their scattering features. Firstly, the ship slice preprocessed to obtain binary image, from which density features can be extracted, describing point distribution. Finally, support...