I am having some difficulty getting Custom Polygons to show up on my HDS unit when I have an IMC created raster image in the background. Major contours will show up, but not Custom Polygons. If I turn off shaded relief on the HDS unit the raster image disappears revealing the Custom Polygons. Is there anyway to bring Custom Polygons to the foreground?

It sounds to me as if the at5.xml file could be missing. This file contains information about how vector components are displayed over raster. Are you copying it over with your .at5 files? If you are generating exported ReefMaster shapefiles yourself in the IMC, then you need to check the Auto Create XML option, which generates this file. Without this file, polygons won't be shown over raster but - as you have noticed - lines and points will (they always are).

The at5.xml needs to be in the root folder.

You can also create the card as At5 Major Version 13 which allows the DrawOverRaster to be encoded directly into the card rather than using an external reference file. At5 Major Version 13 and this functionality may not be available on all chart plotters.

I am using IMC to create the raster image files. I am using ReefMaster to create the vector files. I am using the at5.xml file that ReefMaster creates on AT5 export. Should I be exporting shape files from ReefMaster and creating the vector files in IMC as well?

Here is the contents of the at5.xml file.

<?xml version="1.0" encoding="UTF-8"?>

-<at5>


-<renderSettings>


-<layersOver3D>


-<layer>

<tagName>a!u!!C!%l!</tagName>

<alpha>255</alpha>

</layer>


-<layer>

<tagName>a!u!!I!%l!</tagName>

<alpha>255</alpha>

</layer>


-<layer>

<tagName>a=T!!#í[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>aGT!!#í[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>aOT!!#í[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>aWT!!Jí[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>a`T!!Jí[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>ahT!!Jí[-</tagName>

<alpha>1</alpha>

</layer>


-<layer>

<tagName>apT!!Jí[-</tagName>

<alpha>1</alpha>

</layer>

</layersOver3D>

</renderSettings>

</at5>

"The at5.xml needs to be in the root folder."

That fixed it. Thank you.