Hello, I have a autohelm 50 radar unit on my 1992 Catalina 36 which is mounted on the mast about 3 feet above the spreader. It seems to read OK at long distances but not so good at close range. Should I move it below the spreader or put a shim under it to pan lower?  (what abouts the old holes?) I have the mast off the boat for the winter, so now is the time to do it. I just bought the boat and sailed it from Lake Michigan to Lake Superior (Apostle Islands) last summer.     Any input helpful, thank you, Dave

Views: 1218

Reply to This

Replies to This Discussion

You may have to choose in what range you want to optimize the radar. If above 6 miles range, keep it where it is in the mast, if you are more interested in the area below 3 miles, move it to a stern pole and put in a cradle. I have mine at the stern on my SO37, and works like a wonder in the closest range. Even used it for anchoring at night in crowded anchorages to get exact distances to other boats. However above 6 miles, not that good. When tracking squalls and bad weather at max range it is excellent. Do a rough calculation with beam-with, mounting height, and you may see how far from the boat the beam 'hits' the water. But as you mentioned, you may correct it by putting a wedge under the antenna and direct it down. Even mast rake may come into play.

Hello Dave,

 I'm afraid I don't have much information to offer up on the AH ST50 Plus radar system as it has been discontinued and de-supported many years ago. I did come across a manual that I have posted to this thread. 

 Thx, to Morton for offering up his valuable insight.

Attachments:

Reply to Discussion

RSS

Events

Videos

  • Add Videos
  • View All

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Sandy Trevor replied to Sandy Trevor's discussion NMEA Heading Sensor
"Update: I just installed a Clipper NMEA Compass Sensor and connected it to my C120 ... and it works perfectly: orients the chart, AND re-enables radar overlay. Note that the Clipper device has only 3 wires: Power (+12), Ground/common, and NMEA…"
17 hours ago
Dan Y updated their profile
Wednesday
RB Fish updated their profile
May 19
terry kremer updated their profile
May 18
Lennart Pettersson updated their profile
May 17
Joe Albergo updated their profile
May 8
Robert Thompson replied to Philippe Jean Figueroa's discussion System builder and Visio icons
"Was this problem ever solved?  It is over a year since the last post and the visio file still is not available on box."
May 3
dan distasi updated their profile
Apr 30
Chas McKeown updated their profile
Apr 30
Huw Plummer replied to Huw Plummer's discussion Dragonfly Update Qs
"Hi, I have a follow up on my Dragonfly 6.  One of the pins in the plug on the back has broken off, see out of focus pic attached. Is this something that can be repaired? Thanks Huw Plummer"
Apr 29
OLIVIER CHOQUETTE replied to OLIVIER CHOQUETTE's discussion ST 60 winds indication not working
"Hi I'm back with a different issue now, my wind speed read the boat speed and the wind direction is always pointing downwind. I made the voltage reading and I found as follow Shield to red:8.02 Blue to shield :1.187 Green to sheil: 1.179 Yellow…"
Apr 21
Jack Eaton replied to Chad Lemmen's discussion C-120 Classic integration with EV-200 Sport Autopilot
"I purchased an ev-200, new RADAR and e127 MFD for a 44' Tollycraft powerboat and have been very happy cruising the east coast from Maine to the Bahamas for three years. Recently I have noticed a large and persistent difference between the…"
Apr 17
Ed Laning updated their profile
Apr 15
Robert Novak replied to Mike Allen's discussion E125 Chartplotter issue
"The precision alignment feature worked for me.  I had lost access to the part of the screen that had the find ship icon."
Apr 12
Christopher Bennett liked Barry Stedman's discussion Speed Transducer
Apr 10
Doug Du Toit replied to lilian's discussion replace ST60 wind with i60
"I had my ST 60 Wind screen climb from the 19 kt wind to 28 kt, then die on me. Showing only wind direction at the top of the screen, and "---". I tried to reset the display, but nothing registered. I checked the connections at the base of…"
Apr 10

© 2017   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service