I was forced to replace the speed log impeller on my B&G Hornet which worked reliably, accurately for 30 years... with an Airmar DST800.
It's been in the hull
since April 2015. I am so far not enchanted with it for the following reasons not in order of importance:
1. It all black, plastic and where it's installed (old B&G hole) it dark and difficult to see. ( I have the same issue with my car FOB which is black and hard to see when I drop it (often) in the black interior). Why not white????
It has a insert direction "arrow" which is a raise graphic... very difficult to see as well.
2. It seems to get clogged rather easily... more easily than the B&G impeller. I had the bottom scraped 2 weeks ago... cleaned a very very fouled impeller... which worked for one weekend.... and stopped. When I removed it for inspection
... there was barely anything on it... but the impeller can move laterally. I wonder if this plays a role???
3. The accuracy seems odd to say the least... hard to adjust from the Hornet... either too fast or too slow with consideration for the current
. I've tried changing the "damping"... maybe I haven't found the best setting... Is this a B&G Hornet problem or an DST800 one?
I suspect this is a common speedo.... so I ask what is the experience of others and what instrument is is paired with?
Can it send data to the Hornet and a B&G T7 at the same time? Does it have a temp output? If so can this be displayed on what stand along instrument?