Our brigade has a quick fill pump trailer that you can station at any dam,bore or other static open supply and leave it there for easy access by appliances
However the brigade has yet to change the radio thats in the transmitter box which works our pump trailer,cause the pump trailer was made back when all appliances had 163MHz VHF radios
So technically the only way to work it is by having someone there to turn it on manually until a new updated radio is placed in it
The way it was activated automatically was by putting the radio on channel 3 and keying in a series of clicks using the microphone which were then transmitted to the pump trailer and if they were keyed in right the pump & sensor lights would automatically activate
This made it very easy for appliances to locate and fill up from the pump trailer at night time
No i wasnt the inventor of Kalangadoo brigade's pump trailer it was my dad as he's an electrical genius