I altered the distance formula. I sort of think it's right but I am not sure I understand RA/Nortek's formula (which, btw, contradicts EB/Nortek's formula).
Since I think a new manual is in the works, I will stop bothering Nortek on this, and see if things are clearer in the new docs.
All I can say for now is that the echosounderRaw and echosounder results look quite similar now; see dek05.Rmd for a comparison.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.