Some online libraries provide free access to sailing magazines.

https://navygeneral.rbdigital.com  is the Navy MWR online library that I use.  It includes  the "Cruising World", "Yachts & Yachting", "Sailing Today", and "Classic Boat" magazines. It has back issues as far back as 2013.

To access this Navy MWR online library, you must register at this site https://www.navymwrdigitallibrary.org by using your CAC or DS Login credentials.

This link explains who is eligible, and has links to online libraries for other service branches  https://www.navymwrdigitallibrary.org/login