No, port and starboard out as far as you set. Depending on depth of water, distance can be 20 to several hundred feet port or starboard
It can be linked if you have the proper cable but I do not think the seven CV has a wireless mood if you like them together be sure to use the same ground on the Both of the units
I guess as long as you have the correct power source and a way to attach and lower the transducer I would think it would work fine. It does a great and detailed job of painting the bottom and fish.