I wanted to add the 'chirp' capability to my boat. I already have a fully networked system in place but it is old enough that I could not 'upgrade' the system instead would have had to replace almost all of it to gain chirp. so I bought the standalone Dragonfly from Raymarine. it runs about $700 US and includes the charts for Canadian and US waters along with a matching transducer, everything you need in a single box. it works really quite well and I am impressed with the plug and play ability this provided. easy to install and operate and I could actually 'see' halibut laying on the bottom in 125' of water this past spring, amazing. allows you to adjust where in the water column you wish to focus the entire screen so some really handy features. but, you can't integrate this into any other system so be advised of that limitation.
