sailing ship
Recently Published Documents


TOTAL DOCUMENTS

119
(FIVE YEARS 16)

H-INDEX

8
(FIVE YEARS 0)

Heritage ◽  
2022 ◽  
Vol 5 (1) ◽  
pp. 170-191
Author(s):  
Dragomir Garbov ◽  
Kroum Batchvarov

We report on the interpretation of a late medieval Eastern Mediterranean glazed ceramic vessel with sgraffito decoration depicting a sailing ship. The artefact represents a chance find that was recovered outside the excavation area of the Ropotamo underwater archaeological excavations on the Southern Bulgarian Black Sea Coast in 2017. Fragments of late medieval sgraffito-decorated ceramics with depictions of sailing ships are rare. Complete examples can be considered exceptional. The Ropotamo artefact is of particular interest due to the freehand execution of its decoration, which suggests some understanding of contemporary ship proportions and seafaring practices on behalf of the artisan. The specimen is analyzed against similar artefacts and discussed in the context of maritime graffiti from the Black Sea and Eastern Mediterranean regions. The aim is to establish its potential for studying archaeological ceramics and evaluate the extent to which the decoration reflects aspects of Eastern Mediterranean maritime culture of the late Byzantine and early post-Byzantine periods. More research is required to appreciate the full potential of the Ropotamo artefact. A hypothesis for origin, dating and significance has been proposed. However, due to a shortage of published parallels, it may be subject to further refinements in the future in case more stratified similis are identified.


2021 ◽  
Vol 7 (3) ◽  
pp. 14-19
Author(s):  
A. B. Gudkov ◽  
F. A. Shcherbina ◽  
O. N. Popov ◽  
V. P. Chashchin

Aim: to reveal the features of cardiovascular system functional reserves in naval cadets under the conditions of a long voyage.Materials and methods. 70 cadets undergoing training and sailing practice for 165 days on Sedov training and sailing ship were studied. Cardiovascular system reserves were determined once a month indices before taking over the watch. The results were elaborated using the SPSS program, v 17.0 (IBM).Results and their discussion. On the first, second, and third months of the voyage, the naval cadets retained the functional reserves of the cardiovascular system, which is indicated by the typical normotonic reaction in its activity in response to physical activity.On the fourth and fifth, the cadets showed signs of a decrease in the reserves of the cardiovascular system, which is manifested by a slower recovery after standard physical activity, a decrease in the inotropic reserve index and an increase in the chronotropic reserve index.


2021 ◽  
Vol 8 (1) ◽  
pp. 67-96
Author(s):  
Katherine Hauptman Wahlgren

The study of rock-carvings has developed into a separate field of archaeology, often outside the general discourse. The number of works on the subject does not reflect the wide range of interpretations that could be expected. Rather than inspire, the pictorial world has restrained the interpretative discussion. During the first half of the 20th century the religious approach dominated, while the perspective of the 1970s and '80s focused mainly on mani festations of status. The 1990s marked a revival of interest in the ritual dimension of the rock-carvings. In this article it is argued that rock-carving interpretations ought to be integrated into the wider discourse, as well as into a local context of contemporaneous ancient remains. Another important task for future research is to study the meaning of the carving act, not only the significance of the images.


2020 ◽  
Vol 27 (3) ◽  
pp. 149-158
Author(s):  
Marcin Życzkowski

AbstractThe article describes the methodology related to determining the multi-criteria routes for sailing ships. Details of sea area discretisation and discretisation of the description of the sailing vessel properties and manoeuvring principles are shown. User requirements were specified (for five different categories of users) and on this basis the criteria for selecting the most suitable shipping route were formulated. The presented algorithm recommends a route for a given user category by means of defined restrictions and configuration parameters. The applied multi-criteria approach proves the universality and usability of the sailing ship route planning method.


Author(s):  
Sanne van Essen ◽  
Henry Bandringa ◽  
Joop Helder ◽  
Bas Buchner

Abstract Experiments with a flat plate in oblique waves at different speeds, wave conditions, headings and drift speed were done to evaluate non-linear wave run-up along a sailing ship. Both the incoming and diffracted part of the run-up were highly nonlinear in all test conditions. The run-up was larger at 135 than at 150 deg heading, the influence of speed was small, wave steepness increased run-up up to the point of breaking and a drift speed decreased the run-up. Most of the observed differences were larger than the seed and basin variability. (Semi-) linear diffraction methods are not sufficient to predict the highest runup crests, but applying them to screen for critical events could be further studied. CFD is able to accurately predict the nonlinear run-up in such selected events. Combining different levels of tools seems the most efficient way to predict extreme wave events such as green water due to run-up.


2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Pei-yin Yuan ◽  
Ping-yi Wang ◽  
Yu Zhao

Large-scale landslides often occur in river-type reservoirs, and landslide-generated waves affect navigation channels and the navigation of ships. Thus, such waves cause widespread regional disasters. This study establishes a mechanical model of landslide-generated waves via field investigations and data collection, reveals the mechanism and process of landslide-generated waves, and investigates the propagation characteristics of landslide-generated waves along a sloping wave. The feasibility of the model is verified via (i) regularity analysis, (ii) comparative analysis of the effect of landslide-generated waves of mountain river channel reservoirs on the movement characteristics of navigation vessels and stationary vessels, (iii) deviation from the equilibrium position, and (iv) an in-depth study of the influence of large-scale landslide-generated waves on ships in different navigation positions in a river channel. Countermeasures are proposed for a sailing ship to tackle a sudden landslide-generated wave; these measures can provide a theoretical basis for ships to sail safely through large-scale landslide-generated waves.


Author(s):  
David Trotter

This chapter demonstrates that the question of the interface as a cultural form arose most productively during the nineteenth century in the context of technologies relating to sea rather than land. The ‘system’ or ‘medium’ at issue was that of the crew and material apparatus of a sailing ship: the ship’s captain gained access to it by means of the quarterdeck, and the ‘digital command’ (Rachel Plotnick) the quarterdeck affords. The question of the interface arises in Joseph Conrad’s most notable sea tales: ‘The Secret Sharer’ and The Shadow-Line. The chapter provides an analysis of these tales, and of Heart of Darkness, in which a sea captain ventures upriver on a steamboat. Marlow’s demonstrable if anguished mastery of his ship-medium can be understood as an attempt to repair and extend the connectivity that sustains empire. Conrad examines the political and moral cost of assuming that the medium is the message.


Sign in / Sign up

Export Citation Format

Share Document