Davis Rudder Position Indicator

I have a new to use 2004 Yacht. The technology is 2004 and the darn thing did not have a RPI.I got an estimate of about $1500 to have an electronic one installed. My guy recommended I try this. It's so simple it's genius. And the dam thing works!

I have a pontoon boat. This product does not work. DO NOT BUY THIS PRODUCT. It's a waste of money

I purchased this devise 15 years ago on my first boat and it’s a godsend!It’s very helpful to know when your outdrives (rudders) are straight when coming into dock or tight places!Don’t ask me how it works, but it does! Best $50 I’ve ever spent on either of my boats!