Review on Garmin Airmar B150M Thru-Hull Mount Transducer with 20° Tilt - 010-11927-22 by Brent Porter

I switched from a Garmin transom mount to a B150M and now I can read the underside flat. I was offered $500-600 to install it at a nautical store, so I decided to do it myself with the help of YouTube. Running the cable in my boat was difficult because I had to remove the well, but it took some patience and a day off. This has worked great for me for the past few weeks and is probably the best money I've spent on a boat.