Drift voyages across the mid-Atlantic

Callaghan, Richard

doi:10.15184/aqy.2015.25

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…probabilistic) methods have been popular in drift voyage modelling (e.g. Callaghan, 1999Callaghan, , 2001Callaghan, , 2003bCallaghan, , 2011Callaghan, , 2015Callaghan & Bray, 2007;Irwin et al, 1990;Montenegro et al, 2016; see also Davies & Bickler, 2015: 219;Evans, 2008).…”

Section: Tablementioning

confidence: 99%

Digital Navigator on the Seas of the Selden Map of China: Sequential Least-Cost Path Analysis Using Dynamic Wind Data

Perttola

2021

J Archaeol Method Theory

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During the age of sail-powered ships, the maritime trade networks of Southeast Asia were highly cyclical in nature due to the biannually switching wind directions of the East Asian Monsoon. The Selden Map of China provides us with a glimpse of these connections in the early seventeenth century, and it is drawn in a unique way that allows the sailing durations between ports to be measured. In this paper, a novel method of simulating directed sail-powered voyages is developed. The method utilizes ArcGIS Pro’s functionality through Python macros, and unlike the previous least-cost path (LCP) sailing models, it is based on sequential LCP analysis using dynamic real-time series wind data. The optimized routes and sailing durations generated by the macros are then compared against the Selden map. In general, the model performs reasonably well in favourable winds, but is unable to simulate tacking properly in adverse conditions. The results allow the visualization of wind patterns in terms of time spent at sea and demonstrate the inherent natural rhythm of maritime movement and trade in the South China Sea region. The macros are freely available and can be modified to simulate directed sailing in other time periods, localities, and environmental settings.

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Section: Tablementioning

confidence: 99%

Digital Navigator on the Seas of the Selden Map of China: Sequential Least-Cost Path Analysis Using Dynamic Wind Data

Perttola

2021

J Archaeol Method Theory

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“…Some great ocean voyages are speculative, for instance ancient trans-Atlantic and trans-Pacific journeys, in either direction, by artefacts drifting and possibly by people (Callaghan, 2015;Jett, 2017). Long sea journeys which are known from past millennia typically involve islands and island hopping (Depraetere, 2008).…”

Section: Oceans Of Hope Through Migrationmentioning

confidence: 99%

Islander migrations and the oceans: From hopes to fears?

Kelman¹,

Stojanov²

2021

ISJ

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This paper explores islanders’ hopes and fears for migration and non-migration, highlighting the role of the ocean. Migration, non-migration, hope, and fear are human conditions. To examine these conditions for islanders and oceans, this paper uses a qualitative evidence synthesis for collating and interpreting themes on the topic. Some types of hopes and fears, and a few reasons why they might emerge, are covered for islanders and ocean-related migration. Then, different ocean representations which islander migration and non-migration produces and portrays are presented. The conclusions question dichotomies and norms in the context of islander fears and hopes, as well as threats and opportunities, regarding ocean migrations.

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Experimental archaeology and the earliest seagoing: the limitations of inference

Cherry

Leppard

2015

World Archaeology

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Drift voyages across the mid-Atlantic

Cited by 5 publications

References 14 publications

Digital Navigator on the Seas of the Selden Map of China: Sequential Least-Cost Path Analysis Using Dynamic Wind Data

Digital Navigator on the Seas of the Selden Map of China: Sequential Least-Cost Path Analysis Using Dynamic Wind Data

Islander migrations and the oceans: From hopes to fears?

Experimental archaeology and the earliest seagoing: the limitations of inference

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