This is a forum for u-blox products. At this point, the forum resources have explained as much as possible about u-blox equipment and standard NMEA. Your worst nightmare is that Raymarine may be expecting Raymarine proprietary messages as well (to prevent leakage of their GPS receiver market to third parties) or uses a more complex serial interface ( e.g. their high-speed bus, or high-speedbus two, or RS-485 signalling to support multiple devices on one common bus)
With no responses so far from u-blox forum members knowledgeable about Raymarine products, it is over to you to research the internet and Raymarine resources to find answers to your problem.
Start here: (copy and paste into your browser)
Yes, this will take some time and understanding. Good luck with your project.
Post your success to both the Raymarine forum and the u-blox forum.