Steve, I had interphase and found it erratic . The B&G forward scan is much better and would definitely have shown a large rock or ledge. Another nice feature, even when not in the scan mode and without it displayed on the plotter , you have a green area displayed on the plotter in front of your boat that turns to yellow as the depth decreases and then turns red when you enter an area of dangerous depth , that you set up. Just looking at You Tube of the San Blas , looks beautiful , thinking of doing it next winter.
toggle quoted messageShow quoted text
Have Fun !
From: Stephen Davis flyboyscd@... [amelyachtowners]
Sent: Thu, Nov 9, 2017 12:25 pm
Subject: Re: [Amel Yacht Owners] Re: phased electronics replacement
My 2 cents worth...2 days ago we were slowly navigating down a remote uncharted bay in the less traveled Eastern San Blas of Panama. We were using the the Eric Bauhaus charts from "The Panama Cruisers Guide". His chart indicated 15 meters, and we were indicating 54' on the sounder just creeping along. We went from 54' to hitting something and coming to a rapid stop in the blink of an eye. We were able to back off, and immediately showed 54' again. The water was brown, and Liz was spotting on the bow with no indication that anything was ahead of us. Fortunately, we were going slow, and other than some scratches on the iron part of the keel, no harm done.
Moral of the story is a functional forward looking sonar may have prevented this, and giving me the confidence to continue instead of turning around as we did. I have used an old interphase unit many years ago in Hawaii, and even with the older technology, I found it very
Aloha SM 72
Puerto Lindo, Panama
I have not installed forward scanning sonar. At least, not yet.
It has been a quite a while since I last evaluated forward sonars, so my comments might be very out of date.... The ability to actually display something I felt I could easily interpret in real time at a useful level of precision didn't impress me. The times we bump bottom we are going from 6.9 feet to 6.5, not from 40 feet to 5 feet. I know some people swear by them, so there is utility there I am not seeing.
Double that on the power usage of the 3G radar! We routinely leave the radar on at sea now. One of the downsides people have listed about the broadband radars is that they are not as good at rain/squall detection. I don't see it. On our trip down here we wer
e regularly seeing rather light squall activity well before the rain started to fall to the surface. For weather tracking and avoidance at sea, the 3G certainly meets my needs, even if it can't pick out a spot of drizzle at 20 miles!
It was good to meet you,
LMC, Fort Lauderdale, FL
, wrote :
Bill, Due to a lightning strike we had every instrument on the boat replaced from tv antenna to ssb , everything. I chose to go with all B&G , 12 inch plotter at the helm and a 9 in. at the nav . station. I opted for the Forward Scan , it seemed erratic , with the image of the bottom spiking up
and down , while in an area with a flat bottom (Chesapeake Bay ) . I could place no faith in it to accurately depict what was in front of me. I installed a new transducer , as suggested by a B&G rep. , I have yet been able to test it out, and will be hauling the boat asap . My question, do you find the forward scan to accurately depict an image of the bottom , or is the image erratic , showing the bottom depth shoot up and down. I thought that perhaps the mud bottom we have here does not reflect well and maybe it works better in a sand / coral bottom . I also really like the radar and it uses very little power . It was nice to meet you in Annapolis.