Check Questus Backstay mount...
Hi, Greg--I've used the Questus backstay mount on both a Hunter-34 and now a Cataline-42 - both with a Raytheon/Autohelm radar units. Installed both myself. Have been very pleased. IMHO, the backstay mount goes with the lines a bit better than a pole sticking straight up. My only suggestion is to mount the backstay pole in front of the stay, but swing the radar platform behind the stay. The resulting balance is better with far less stress on the stay. The less expensive Questus 400 unit works well for a split backstay.This is far, far easier than a mast mount. With the radar about 12 feet above WL, you have over 6 miles range - that's an hour's sail to a stationary object or about 20 minutes to get out of someone's way. Recall that distance to horizon is a square root of height, so going higher or onto the mast gets into diminishing returns.Downside, Questus is a bit pricy, but my backstay mount is doing very well after 10 years and two boats. Unless you absolutely never sail when the radar is on, I stongly recommend the self-leveling mount. The narrow vertical beam width of all marine radars means that without self-leveling he horizon will disappear when heeling more than about 18 degrees - and you will never know it. Sobering thought.Cheers-Ernie April(WindCatcher, C-42)