Quote Originally Posted by slipfloater View Post
I have been thinking about buying one of these units for awhile now and the info here is great. Thanks. My question is how do you mark waypoints when you find astump,brushpile or something you want to mark. Also when you see the stump or whatever on the screen is it directly under the boat at that point? This thread is very educational btw,thanks to all.
Actually, slipfloater .... that "stump" could be anywhere within the coverage area of the unit's cone, so it may or may not be directly under the boat (transducer) as that would depend on the water depth.

Remember, this unit (di) is sending out a ping signal that's not very "thick" (front to back @ 6deg) but is a 45deg angle (side to side) @ 800kHz ... and 75deg @ 455kHz. That produces an elongated oval shaped coverage area. This is much different than what a regular depthfinder does, which is putting out a true "cone" shaped signal of around a 20deg angle, which results in a circular pattern of coverage. (20deg angle in every direction)

As for marking a waypoint ... I've only done it on the emulator program, on my computer, but this is how I got it to put waypoints on the chartmap : with the split screen of map/sonar, I used the arrow key pad to move the crosshairs to a point on the map, then hit the Enter Key TWICE. That put a numbered waypoint icon on the chartmap. I would think that in "realtime" use, it would work the same way ... but I'll leave that up to those that have used their unit to mark waypoints, to confirm or explain how to. I'd really like to know, myself !!

... cp