southatlantic
New member
I have a NavNet 3D system ( 3 x MFD12, 1 x MFD 8 displays, DRS6A radar, DFF1 with an Airmar SS270W transducer, GP330B receiver, HUB101, FA-30 AIS receiver and Airmar PB200 weather station ). On the whole, I am very happy with it and would highly recommend it. :furuno
The one aspect that left me a bit disappointed was the sounder performance, for such a top notch sounder/transducer combination. When the water gets over 100m deep, it still shows the bottom on the screen, but not the depth reading. Beyond about 250m, it loses bottom altogether, even if I slow down to a crawl. All I see are a few thin vertical lines on the split screen ( I normally use a split HF/LF screen ). I had the range on manual with range set for 1000m. I tried both the manual setting (with gain from 50% to 100% ) and the Cruising setting, to no avail.
The transducer was well installed by a competent custom boat builder and does not appear to be in line with anything capable of generating turbulence (and the fact that the problem persists at very low speeds probably rules turbulence out, anyway). The transducer uses the Airmar high speed fairing. The boat is a 46 ft power catamaran with twin inboard diesels.
Any ideas on what might be the problem or suggestions for improvement? :?
Would reducing the Picture Advance Speed help?
Appreciate any inputs.
The one aspect that left me a bit disappointed was the sounder performance, for such a top notch sounder/transducer combination. When the water gets over 100m deep, it still shows the bottom on the screen, but not the depth reading. Beyond about 250m, it loses bottom altogether, even if I slow down to a crawl. All I see are a few thin vertical lines on the split screen ( I normally use a split HF/LF screen ). I had the range on manual with range set for 1000m. I tried both the manual setting (with gain from 50% to 100% ) and the Cruising setting, to no avail.
The transducer was well installed by a competent custom boat builder and does not appear to be in line with anything capable of generating turbulence (and the fact that the problem persists at very low speeds probably rules turbulence out, anyway). The transducer uses the Airmar high speed fairing. The boat is a 46 ft power catamaran with twin inboard diesels.
Any ideas on what might be the problem or suggestions for improvement? :?
Would reducing the Picture Advance Speed help?
Appreciate any inputs.