Mercury - Cruiselog Gauge Speed & Trip Monitoring White Face Brushed Bezel 79-8M6020068. OverviewThis Cruiselog gauge gives you a steady, straightforward way to keep track of your speed and how far you've traveled. The needle moves in a calm, predictable sweep, so even in chop you still get a clear read. On the water, it fits right into your normal scan-quick look, quick answer, and back to running the boat. It's the kind of tool that keeps the day organized without making things complicated.. K