My old boat has a Simrad, it never missed a beat., even at .8 mph for walleyes, my new boat has a Raymarine and I absolutely HATE it .. Just a total pain in the but, you have to be over 5 mph to engage and it kicks out below 2.2 mph, one heavy gust of wind and you have to speed back up to 5 mph to have it re-engage .....sucks, sucks, sucks !!!!!!