Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is this unit for saltwater?
Document: This unit is to cool.... It does more then I thought. It alarms for fish,shallow entering unknown areas.It costs, but it does everything.
This unit came as advertised and it works well with the loaded Navionics package. It was the lowest price I could find.
This unit has graphics like I have seen on units that cost three times as much. If it would catch fish,that would be great also :-)
This unit does it all. The only complaint I have is that it sometimes requires a lot of key strokes to do things. Also, there is no operators manual for the Navionics functions (like tide charts).
That's pretty annoying when you're moving at a good clip. Other than that it's been very helpful on the water. It also does not come with a sun cover so you have to purchase that separately. My unit was made in Mexico. Good luck and tight lines!
Nice unit. Bright clear display. Easy to use menus. Wide screen allows for two screens, but three will fit. Should have come with the cover, I bought that extra, you will need it.
This unit has a defect with the ability to show debt at any speed over 40mph. The manufacture had me go through several transducer placements and had me upload the upgrades. The actual down scan is not as detailed as advertised, i would sudgest getting a unit with side imaging.
This unit is awesome. The vivid imagery from the downscan is remarkable. Best unit for the money hands down!! Very user friendly and the gold sdi card gives great chart at a click of a button. also the split screen and triple screen view is an awesome feature.
My father in law bought the same unit when I bought mine and he loves his. He only uses the built in GPS to mark fishing holes and measure distances to his favorite spots. He doesn run a mapping card like I do, so the map scrolling issues and redrawing issues I experienced aren't an issue for him.
If you haven't noticed gps units are going to Degree-Minutes coordinates and away from Degree-Minutes-Seconds coordinates. So if you have the Elite 7 it is in Degrees-Minutes and if you have an old map of a lake with waypoints in Degree-Minutes-Seconds you'll land up in the trees somewhere if you just add the seconds onto the minutes. You will have to convert them by dividing the Seconds by 60 then adding them to the Minutes. The unit will be dead on.
Answer: yes