My initial attempts at building an RC boat were a disaster. The first one I built used 433MHz RF modules that somehow worked properly only on land. The moment I placed the boat in the water, the electronics would go crazy (probably due to EM noise) and I had to dive in to save the boat. So I decided my next one would use 2.4GHz RF modules, and this post here is about my successful attempt 😀
I used a 2 liter Pepsi bottle as the boat hull. For the RF link, I used nRF24L01+ RF modules , and the friendly Arduino as the boats brains.