Humminbird Side Imaging Forums

General => General Discussion => Topic started by: generalpatton71 on May 17, 2012, 07:53:22 AM

Title: Navioncs and lake level offsets
Post by: generalpatton71 on May 17, 2012, 07:53:22 AM

So I'm heading to KY lake for a few days and I'm planing way points out ect and it occurs to me the lake is down by three ft from summer pool. I was going to just off set the map with this info but then it occurs to me KY lake has different lake levels they keep it at different times of the year. So what lake level is Navioncs basing there depth readings on? Does anybody know where to look to get this info?

Title: Re: Navioncs and lake level offsets
Post by: ITGEEK on May 17, 2012, 08:02:14 AM

I would assume it's based on the average water depth.
You will have to contact Navionics to be sure.

For Waypoints/structure, it doesn't matter what the depth of the water is.
These things are viewed from looking straight down onto the water from the sky.

If the water level is low, then some of these may be high and dry, but their
GPS position won't change.

Title: Re: Navioncs and lake level offsets
Post by: generalpatton71 on May 17, 2012, 08:23:40 AM

Roger that but as I'm looking at ledges and where it safe to run at 3-6ft is a big deal.