

The first picture shows the transducer facing the wrong way, I always mount the FF on the right side of the yak, just mounted it on the left side in this picture to take the pictures.
I use a Humminbird 597 GPS/DI combo unit, even in direct sunlight there is no problem reading the screen. I have also had a Humminbird 788, and a Humminbird 857 on my yak and boat with no problems reading the screen in direct sunlight. The screens can be a bit bright if you fish at dawn, dusk, or night though, not sure if the screen can be adjusted so it is not as bright via the settings.
I am using a Mad Frog Liberator mount with a transducer arm. The Mad Frog Liberator is mounted to a Scotty Fish Finder mount which in turn is mounted in a Scotty rail mount. Everything except the battery which is in a Walmart waterproof box which I have next to the seat is easily removed and everything stays together on the Liberator mount although I usually take the FF off the mount to make it slightly less heavy. No holes drilled anywhere and the transducer is in the water so I know what the water temp is. The FF is right next to the seat so it is easy to reach, easy to view, and easy to change the settings. I do have to flip the transducer up when in shallow water. I like having everything next to the seat so there is nothing to trip over when getting in and out of the side of the yak.
I did have to add a thin piece of rubber to each Scotty rail mount from a bicycle tube so that the rail mount would not spin on the rail.
I have used this set up for three or four years without a problem and nothing has broken yet. I was a little concerned about the transducer arm breaking at first but it has been very durable.
http://madfroggear.com/index.htmlhttp://scotty.com/Also, YakAttack has lots of cool ways to rig a FF and transducer:
http://www.yakattack.us/