Gregg, I have been running some tests with my 997 and Garmin 72 units side by side. I compared the accuracy of speed and most important, the units showing "0" mph (varies signal). Did not see the 997 lose signal once, where as the 72 lost the signal many times. Traveling .8 to 1.2 mph. The HB seems to have better programing on any signals fluctuating. Not once was the HB showing "0". The feature requested should not be a major programming task. Would be a great tool for trolling in lakes with logs on the bottom and from what I have seen on other units, no one has this feature. Could be another first for HB.
Chuck
From Steve Wunderele - 10-2-84 --"A fishing trip maybe brief, but it's memories are endless."