The DI image in the HB SI units is a "computer generated blend" of the left and right SI image data...
This is a post from Greg in another thread...
The Di sonar in the HB Si units is a blend of both the left and right Si sonar:
*- take the right Si sonar and rotate it 90 degrees clockwise.
*- take the left Si sonar and flip it horizontally (mirror image) and then rotate it 90 degrees clockwise.
*- overlay the two images and you have a Di sonar image.
Rickie

