The Rocna User's Guide contains general instructions for anchoring, including tips specific to the Rocna. It is available in multiple languages in PDF format from the main Rocna.com website. Select the link below.
A hard copy of this should have accompanied your anchor.
Best anchor deployment and set practices, and issues surrounding retrieval.
Getting the best performance from the anchor – heavy chain / catenary, or long rode / scope?
Options and considerations for riding to more than one anchor, including a link to "the ultimate guide to tandem anchoring".