Polar Op - Polar communications - Iridium A4

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

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

Symbol	Meaning	Unit
$Polar communications - Iridium A4$	Polar regions > 70°

Source: IMO Polar Code (MSC.385(94))

Polar communications - Iridium A4 operation card: Polar regions > 70\u00b0.