New Zealand Maritime Rules, Part 40D, Radio Battery Calculator
In New Zealand, Part 40D, radio, of the MNZ Rules for commercial vessels requires ships to have a reliable emergency power supply for their marine radios, ensuring continuous communication in the event of a main power failure. This is an important safety measure outlined in standard Maritime NZ Rules, Part 40D, for Fishing Ships and relevant radio communication regulations.
This calculator enables owners to check their backup battery capacity before surveys and rectify any deficiency before the surveyor or inspector’s visit.
This calculator helps boat owners estimate the battery capacity needed to keep their radios and accessories powered during emergencies. By entering the loads connected to your radio system, you can quickly check if your battery setup meets the required capacity for both inshore and offshore conditions.
Although not a requirement for pleasure boats (non-passenger and non-SOLAS), it is good practice. Stay safe on the water by ensuring your emergency power supply meets the standard.
If your boat comes under SOLAS rules, consult your surveyor for advice.
Tweedsmarine Radio Battery Calculator
Enter Loads
Enter all loads connected to the radio battery here. The form takes three types of input; transceiver, light and accessory. The load calculations for each are different so be sure to select the correct type.
- Transceiver: A VHF or HF (SSB) radio, enter current draw for transmit and receive.
- Light: If an emergency light is fitted which is powered from the radio battery enter its current draw.
- Accessory: Sometime and emergency GPS or such equipment is also powered from the radio battery enter these loads under the accessory category.
Loads
| Load Name | Transmit Load (A) | Receive Load (A) |
|---|
Click the button to calculate the required battery capacity
Battery Capacity Required
| Condition | Battery Capacity (Ah) |
|---|---|
| Inshore | 0 |
| Offshore | 0 |