Post by lynnardm on Mar 6, 2019 3:32:56 GMT
I created a new thread just for the subject of radar installations on 895's as I anticipate this may be a popular topic.
First, for fun, here's a picture of the conditions you don't want to venture out in. This is in Gig Harbor, Wa. Fortunately we were able to wait it out and the fog cleared before we departed.
Here is a picture of the radar just after installation. The boat (a 2019 model year) is setting level. The boat also floats in this "level" condition when in the water. Of course unusual loading, such as triple motors, can affect the boat attitude :') The radar is mounted on the flat level area where the nav light was previously mounted (the flat area can't be seen in this pic). You can see the 4 degree down angle of the radar. On-plane the 895 assumes a bow up position of about 4 degrees. So when on-plane the radar is aimed "level". 4 degrees is a common attitude for power boats on-plane. In this picture you can also see where the overhead cockpit light has been removed for access to the underside of the radar mount.
This photo shows a closeup of the radar and radar mount. In this picture you can see details including the flat area where the radar is mounted. I haven't previously seen an 895 radar mounted at this location. I chose this location as I determined the roof should be fairly rigid here, it kept the radar at the aft end of the roof thereby saving space for throwing an inflatable dinghy on the roof, and I think the radar and nav light install looks great here.
The flat area where the radar is mounted is approx 4.5" x 10". The radar mount base is designed with the base 4.5" x 8" with a bolt hole pattern 3.5" x 6.5". The radar mount height is 12" and as I mentioned earlier it has a 4 degree down-tilt. With a 12" mount height at this location and the Raymarine radar it provides 7 degrees of downward visibility for the radar beam when on-plane. The front upper edge of the salon roof is what limits the radar "visibility". The roof light obviously protrudes above this area but overall this small light should not be not significant for the radar beam bounce-back. A 10" height would provide 6 degrees of downward visibility which is also good. Raymarine recommends a minimum of 10 degrees which I believe is pretty standard. Both these heights will provide good "visibility" for low objects close to the boat. And of course when traveling off-plane the radar forward visibility distance for low objects is better than when on-plane, respectively at 11 degrees and 10 degrees. The radar mount was built by Sea-Scan to my specs. This is what they do. They did a beautiful job at a very reasonable price ($299). Their design includes the hardware to relocate the nav light on the radar light bar. Their package included all hardware required for the install. Their contact person is Steve and his number is 615-208-5002. He should have this design on file under Jeanneau NC 895 and my name (Lynn Miller), and he told me he gave it a model number of AL1200-4. They are also on the web. I cant say enough about what I good experience it was working with Steve. And once I finalized the requirements he had the mount built and shipped in 3 days! Back to the installation... There is one area of potential difficulty. The underside of the flat mount area has a plywood stiffener imbedded in the fiberglass to add strength to that area for the light mount. But it was significantly smaller than the 4.5" x 10" top surface. It would have been nice if Jeanneau made it the full size of the flat area. I/we got lucky on the installation as the bolts just cleared the plywood stiffener. If the imbedded stiffener varies in size or location on other 895's it could mean that a buildup might be required so the nuts on the 4 mount boats properly nest to a flat surface. One more comment. The installers, after doing this install, did like this approach and felt that this area of the roof was a preferred location to some other options.