Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 27-10-2010, 17:15   #31
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Contary to popular internet myth big ships can NOT filter out class b ais. There are some issues with static data on class b put the basic info is there. Ships state
Can set active/ inactive ranges etc but not " filter out" anything

Dave
__________________

__________________
goboatingnow is offline   Reply With Quote
Old 16-11-2010, 18:58   #32
Registered User
 
Jon Hacking's Avatar

Join Date: Sep 2010
Location: Currently cruising Southern Indonesia, heading for peninsular Malaysia
Boat: Wauquiez 45' (now 48') catamaran
Posts: 523
Send a message via Skype™ to Jon Hacking
Thumbs up Camino-101 initial report

Quote:
Originally Posted by SoggyPaws View Post
So HAS anyone actually bought and used the AMEC Camino-101?? Thinking about making a purchase in the next month and wondering what we're not getting with that unit that we get from other similar (Class B, no display) units.
OK, here are our initial reactions to playing with the Camino-101 Class B AIS.

Overall impression: Itís a nice piece of kit. It seems to do what itís supposed to, quietly & efficiently. Thumbs up!

The good: We bought ours from Milltech Marine for $495. Doug was very helpful. Installation was straightforward. Itís several times bigger than my old SR161 AIS receiver (2x footprint, 2-3x as high) but it fit in the same space. It comes with all cabling youíll need, even a 4í serial cable as well as a separate NMEA cable (which we donít use - we plug all serial/NMEA devices into a KeySpan 4-port serial/USB converter). It uses a proper PL239 VHF connector instead of the BNC on my SR161. It draws almost no power so we just leave it on. It only transmits a burst every 3 minutes if weíre moving at less than 2 knots, so most of the time itís just a receiver. Changing the baud rate & the GPS antenna location was easy with the included Configuration program. We havenít used the included AIS Viewer program much as we want to use the AIS with our navigation programs (MaxSea & OpenCPN). It works well with both nav-programs once we turned the baud rate down to 38.4. The viewer seems to have a concept of ďfriendlyĒ boats, which presumably are ones that the Viewer doesnít worry about.

The bad: A friendís different class B AIS picked up ships a bit further away than my Camino-101. OK, his antenna is 30í high & mine is only 10í high. That may be the whole issue but I canít tell. My Camino seems pretty good out to maybe 40 miles, which seems sensitive enough to me, & I often pick up ships much further away (but there are AIS repeaters here so it's difficult for me to judge receiver sensitivity). Also, the software switch to turn off the transmitter (making it just a receiver) is in the Viewer program, not the Config program. This switch (& some others?) are also not documented in the manual, which seems to refer to an earlier incarnation of both the Viewer & the Config programs. OK, I donít intend to use either program much. Finally, getting called by Brunei Port Control while we were still a few miles away (& planning to wait until tomorrow morning to clear in) made me realize that weíre always visible to the authorities now.

The ugly: The Configuration program is apparently not written for Vista or Win7 (although I ran it under Win7 & it did what I needed to do). It runs OK but when shutting the Config program down, it wants to save some information in an INI file, where the program is stored. Microsoft has said this is a no-no, that only the OS can change the Program Files folders, & that this sort of info should be placed in a mirror folder under C:\ProgramData. So you try to shut the Config program down, it tries to write the INI file, fails, puts up a dialog box saying it failed - & doesnít shut down! You have to either run it as Supervisor or nuke the program with Task Manager. Again, I probably wonít need to run the Config program ever again so itís not that big a deal.
__________________

__________________
-- Jon Hacking s/v Ocelot
Jon Hacking is offline   Reply With Quote
Old 16-11-2010, 19:32   #33
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Quote:
Originally Posted by impi View Post
I cannot seem to get any clear answers to this question, and was wondering if there was an AIS unit that gives one the flexibilty of choosing to switch off transmission of signal whilst still recieving? (eg. in waters where hostile craft are - would like to recieve AIS but not transmit my signal)
Yes, the Furuno FA-150 AIS transceiver can do this. I have one onboard.

You can call Furuno at 888 834-9330 to confirm this. Ask for tech support.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 16-11-2010, 20:46   #34
Registered User

Join Date: Aug 2009
Location: Onboard, currently in Samal Island, Philippines
Boat: St. Francis 44 Mk II (Catamaran)
Posts: 57
Send a message via Skype™ to SoggyPaws
Jon, thanks very much for your thoughtful review.

On disabling transmit mode: Some transceivers have a hardware switch on the outside of the box that will disable transmit. Others have a software switch that you need to run a configuration program for. I am not positive, but I think all of them have a way to stop transmitting while still receiving--and more likely this capability will be in a newer unit than an older one.

I THINK there is actually a capability in the specs for Port Control in a harbor to be able to turn off transmit by broadcasting a code--maybe only for Class B? (not sure where I read this, so don't quote me on this part).

MilltechMarine.com has user's guides and stuff for the units they sell, checking the guide (or email Milltech) would be the best way to confirm for a particular unit.
__________________
SoggyPaws is offline   Reply With Quote
Old 17-11-2010, 05:10   #35
Nearly an old salt
 
goboatingnow's Avatar

Cruisers Forum Supporter

Join Date: Jun 2009
Posts: 13,649
Images: 3
Quote:
I THINK there is actually a capability in the specs for Port Control in a harbor to be able to turn off transmit by broadcasting a code--maybe only for Class B? (not sure where I read this, so don't quote me on this par
NO they cant, they can switch channels , control slot priority etc to ensure that close in ships get priority etc, but the specification does not allow ANYONE to supress AIS transmission, except the ship itself.

IN the early days of Class B myths where progagated that CLass B data could be suppressed on turned off by ships etc, nothiong could be further from the thruth.
Dave
__________________
goboatingnow is offline   Reply With Quote
Old 17-11-2010, 05:38   #36
Registered User

Join Date: Aug 2009
Location: Onboard, currently in Samal Island, Philippines
Boat: St. Francis 44 Mk II (Catamaran)
Posts: 57
Send a message via Skype™ to SoggyPaws
Thanks for the correction (I should have looked this up before I posted)!
__________________

__________________
SoggyPaws is offline   Reply With Quote
Reply

Tags
ais

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
M802 SSB not transmitting nelson.peter Marine Electronics 15 26-02-2015 20:42
Which One Would You Choose ? Bill_R Monohull Sailboats 15 07-04-2010 08:24
BlueSea Dual Switch w/ ACR v. 1-2-B Switch Maddog Electrical: Batteries, Generators & Solar 0 13-07-2009 15:56
SSB Not Transmitting nelson.peter Marine Electronics 19 26-05-2009 08:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.