Something we really enjoy having on Nellie D. are aft and forward looking cameras which are installed on the mast.
The dome camera provides us with a "rear view" and has proven to be invaluable in narrow waterways with heavy traffic. The dome camera is a standard display on our Gramin 5212 along with depth and the chart. The forward looking camera (with 72 IR LEDs) is a bit bigger than the dome camera, but is a perfect color match. This camera is used at night, to help us see things a bit bit better and is displayed on the Garmin. Recently, we also discovered the forward looking camera provided us with a clearer forward view during the day in light fog.