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: 365

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

Ivan Luiz de Carvalho Silva replied to Ivan Luiz de Carvalho Silva's discussion Ray55 and AIS650 no GPS on display of VHF
"Thanks indeed.  Problem solved. The person who made the first instalation did not conected the MFD out to the AIS input. That was the reason why there was no signal at the LOW baud 4800 to the VHF. Today I connected all the wires and get…"
41 minutes ago
Profile IconRandy Laks, Victor Gentile, David B and 11 more joined Raymarine Technical Forum
7 hours ago
Moderator - Raymarine, US replied to Don Anderson's discussion Depth sounder module fried?
"Welcome to the Raymarine Technical Forum Don, Raymarine's US Technical Support Team and Product Repair Center may may also be contacted M-F (0815-1700) Eastern US Time at 603.324.7900.  Mondays and Tuesdays are Raymarine Product…"
7 hours ago
Moderator - Raymarine, US replied to Mick's discussion Dragonfly top clutter?
"Welcome to the Raymarine Technical Forum Mick, The configuration setting responsible to addressing the clutter within the upper portion of the water column is referred to as Noise Filter (MENU->SENSITIVITY SETTING->NOISE FILTER.  The…"
7 hours ago
Moderator - Raymarine, US replied to Maurice Colontonio's discussion AIS Problems with Version 11.26 on an E125 Touch Screen
"Thanks again for the photo.  The pictured device is clearly an AIS650."
7 hours ago
Maurice Colontonio replied to Maurice Colontonio's discussion AIS Problems with Version 11.26 on an E125 Touch Screen
"Dear Moderator: Here is a picture!"
7 hours ago
Moderator - Raymarine, US replied to Owen Pawson's discussion Autopilot for Hunter 336
"You're welcome."
7 hours ago
john choumas liked john choumas's discussion C 140 wide panel and DSM 300 talk issue
8 hours ago
Colin Felton replied to Colin Felton's discussion Type 300 course computer with hydraulic linear drive
"I believe it is a Navico LHA:12A Electro-Hydraulic Linear Actuator.  It has two sets of connections - one set for the reversing motor and the other for the solenoid bypass valve."
8 hours ago
Underway - Raymarine, US replied to Paul Mermelstein's discussion SmartController Battery
"The part number of the replacement lithium battery is A18119, the can be purchased at your favorite Raymarine dealer. "
8 hours ago
Underway - Raymarine, US replied to Andrew Aicardi's discussion AP No Pilot
"Anytime.  Contact us with any further questions."
8 hours ago
Underway - Raymarine, US replied to Sergio Boettcher's discussion p70
"Yes, it needs wind data."
8 hours ago
Moderator - Raymarine, US replied to john choumas's discussion C 140 wide panel and DSM 300 talk issue
"Welcome to the Raymarine Technical Forum John, Please see the message sent to you."
8 hours ago
Underway - Raymarine, US replied to Colin Felton's discussion Type 300 course computer with hydraulic linear drive
"What is the model number of the drive?  Is it a Raymarine drive?"
8 hours ago
Owen Pawson replied to Owen Pawson's discussion Autopilot for Hunter 336
"Excellent - thanks for your help!!"
8 hours ago
john choumas posted a discussion

C 140 wide panel and DSM 300 talk issue

I have a C140 wide panel that keeps warning me of a DSM 300 communication error.  I see some of the solutions and I'm just not sure how I can get the updated software for my CF card.  where's the actual download?I don't have a CF reader or is that another name for the SD slot on my Mac?I just want to get rid of that ridiculous neverending alarm display.  I know I'm close, just have to execute on these items.Thanks so much,.Jack choumasC See More
8 hours ago

© 2014   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service