Success rate s of simulated voyages using SPVN at summer solstice (21 June) as a function of the navigation periodicity Δ t without night sailing.

(A) s (Δ t ) for calcite, cordierite and tourmaline sunstones. (B) s (Δ t ) with calcite sunstone for weakly cloudy (-1 ≤ m dominance ≤ -0.75), medium cloudy (-0.125 ≤ m dominance ≤ +0.125) and strongly cloudy (+0.75 ≤ m dominance ≤ +1) skies. (C) s (Δ t ) with calcite sunstone for weak/slow (1 ≤ σ...

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Bibliographic Details
Main Authors: Péter Takács (563290), Dénes Száz (3943997), Ádám Pereszlényi (4575124), Gábor Horváth (3944000)
Format: Still Image
Language:unknown
Published: 2022
Subjects:
Online Access:https://doi.org/10.1371/journal.pone.0262762.g002
Description
Summary:(A) s (Δ t ) for calcite, cordierite and tourmaline sunstones. (B) s (Δ t ) with calcite sunstone for weakly cloudy (-1 ≤ m dominance ≤ -0.75), medium cloudy (-0.125 ≤ m dominance ≤ +0.125) and strongly cloudy (+0.75 ≤ m dominance ≤ +1) skies. (C) s (Δ t ) with calcite sunstone for weak/slow (1 ≤ σ changeability ≤ 1.5), medium (2.25 ≤ σ changeability ≤ 2.75) and strong/rapid (3.5 ≤ σ changeability ≤ 4) cloudiness changeabilities of the cloudiness ρ between simulation steps. The sunstone type, cloudiness dominance m dominance and cloudiness changeability σ changeability have only a minor influence on s , thus SPVN is robust against these parameters.