Carolena
Guru
We have a 12 volt compressor with a Kahlenberg whistle. The electric AFI horns on the boat were not working when we bought it. We considered air horns since we already had the compressor and tank, but ultimately decided to go with electric since the wirinig was already in place, it would provide a second means of sound if the compressor wasn't working, and becuase they are instant sound (no need to wait for the comressor to build pressure if it is off when we need the horn, like at anchor). We installed Ongaro horns to replace the AFI and have been very happy. Very loud and a great sound (very similar to air). The Ongaro trumpets are stainless, so should last much longer than the AFI. Plus, the have the exact same mounting holes so it was an easy replacement. We love the whistle but use it more for fun than for serious signaling. Kids love it.