Radio/EPIRB Battery - 6 h Autonomy
Check reserve-source battery capacity for VHF / MF-HF radio and EPIRB per SOLAS IV Reg. 13 - minimum 6 h (or 1 h if ship has emergency generator running > 36 h).
Required capacity
53.3Ah
Status
Compliant
Formula, assumptions, and limits
$$C_{Ah,req} = \frac{I \cdot t}{k_{T}}$$
Full load for 6 h, assuming 50 % transmit / 50 % receive cycle. Annual capacity test per SOLAS - record discharge curve vs maker baseline.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $I$ | Reserve load | A | GMDSS equipment list |
| $t$ | Required autonomy | h | SOLAS IV Reg.13 |
| $k_T$ | Temperature de-rating | - | battery maker |
Spotted an error in this calculation? . We acknowledge editorial corrections within two working days.