Polar Code Chapter 10 communications - Iridium (GMDSS A4) mandatory for Polar Code voyages beyond INMARSAT coverage.
Formula
$$ \text{GMDSS} = f(\text{lat}, \text{Polar}) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $A1/A2/A3/A4$ | GMDSS sea areas | - | SOLAS IV |
Sources
- Polar Code Ch. 10.