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Polar Op - Polar communications - Iridium A4

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Polar communications - Iridium A4 operation card: Polar regions > 70°.

Formula

$$ \text{Op} = \text{Polar communications - Iridium A4} $$

Symbol legend

SymbolMeaningUnitSource
$Polar communications - Iridium A4$Polar regions > 70°-Polar Code / IACS PC

Sources

  • IMO Polar Code (MSC.385(94)).