I was in your same boat...(pun intended) last year. I ended up flush mounting a simrad into my dash. I do not fish, so I didn't mount the transducer. My reasoning was based on the following:
1. Brightness. Max brightness on my simrad is 1200 nits. Some phones and tablets may reach 1200 nits, or 1000 nits max, but when they get hot, they dim the screen. Every time I use my phone out on the boat the screen will dim with the phone getting hot. I wanted something that would stay bright even in the heat.
2. Dedicated GPS maps. I boat off the Chesapeake Bay, Elizabeth and James rivers. I can cover a lot of territory and wanted to know water depths real time. Navionics on a tablet/phone will do this for you...however, see number 1.
3. Ease of use. Since this is flush mounted and hard wired, I don't have to do anything extra. Boat batteries get turned on, simrad comes on. Boat batteries go off, simrad goes off. No tablet or phone to remember, charge, etc.
4. Flush mount. I did not want a unit that I was unable to flush mount. I didn't want anything suction cupped or pedestal mounted next to the throttles. I wanted a cleaner look. I understand not wanting to drill holes, cut, etc. I don't know what boat you have, but I can tell you this was EASY. It looks almost factory.
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