Share Electronics fact I just learned on side scanning

[rnvinc]

So when I stop the side scan and mark a waypoint, it accurately log its location. I.e. In the above example, it will mark the 32.7 mark when the 40 foot mark is displayed.

The unit automatically calculates the slant range to any specific pixel you place a waypoint on ...and assigns the calculated waypoint latitude and longitude coordinates as "summed" in that calculation ... (Is "summed"'a word?) ...

So if you place a waypoint at the edge of the display (with 40' SI Range) ... And then calculate the distance difference between that waypoint's assigned longitude and the boat's present assigned longitude = the difference should sum 32.7' ... (as meaning 32.7' horizontal distance to a point on the water's surface directly above that "thing" you placed the waypoint on) ...

Remember a waypoint's coordinates do not take into account water depth (other than using the water depth in its calculation of slant range to any horizontal pixel on the SI image display) ...

See Sonar Quiz #8 here ...
http://www.crappie.com/crappie/side-...onar-quiz-8-a/

Rickie