Some of our courses have an associated PDF that you can download. You will see this image on the right side of the first page of each module.
We recommend that you DO NOT do this. The PDFs are not interactive and you will not have the learning experience that you can gain from the online courses. However they are there for you. We also highly recommend that if you have to - buy the book on Amazon rather than print out a PDF. It is probably cheaper than your printer ink actually. Here is the article which shows all our books available on Amazon.
Additionally, If you want to read offline we have an App for that. Search for NauticEd on the App stores. The Android app will be available sometime in April 2019 but the iOS App is available.