Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 22-01-2017, 15:59   #1
Registered User

Join Date: Sep 2016
Posts: 10
Heading Alarm?

Anchor alarms galoreĖbased upon position or depthĖbut I donít know of a system that provides for a warning when the boatís heading changes beyond a preset value. For wind and/or current shifts, a heading alarm may work best. Anyone know of a system that has this feature, or better yet, has anyone had experience with it? Thanks in advance.
__________________

twelve is offline   Reply With Quote
Old 22-01-2017, 16:03   #2
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 4,597
Images: 4
Re: Heading Alarm?

There are some free computer programs that can do this. NavMonPc does (I wrote this), and I think this is available on OpenCPN. There are of course programs you can buy with this capability as well.
__________________

__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Old 23-01-2017, 04:57   #3
Registered User
 
ranger42c's Avatar

Join Date: Aug 2012
Location: Maryland, USA
Boat: 42' Sportfish
Posts: 3,930
Re: Heading Alarm?

Quote:
Originally Posted by twelve View Post
Anchor alarms galore–based upon position or depth–but I don’t know of a system that provides for a warning when the boat’s heading changes beyond a preset value. For wind and/or current shifts, a heading alarm may work best. Anyone know of a system that has this feature, or better yet, has anyone had experience with it? Thanks in advance.

Our autopilot alarms when we're off-track, if we've been overpowered by either wind or current. Ours is a Furuno NavPilot 511, but I'd have thought most APs have this feature?

-Chris
__________________
Selby Bay, South River, Chesapeake Bay, USA.
ranger42c is offline   Reply With Quote
Old 23-01-2017, 06:00   #4
Registered User
 
rwidman's Avatar

Join Date: Feb 2008
Location: North Charleston, SC
Boat: Camano Troll
Posts: 4,669
Re: Heading Alarm?

My Garmin 5208 has such an alarm. I don't use it but it's available.
__________________
Ron
HIGH COTTON
Sent from my laptop using Windows 7
rwidman is offline   Reply With Quote
Old 23-01-2017, 07:25   #5
Long Range Cruiser
 
MarkJ's Avatar

Cruisers Forum Supporter

Join Date: Dec 2007
Location: Australian living on "Sea Life" currently in England.
Boat: Beneteau 393 "Sea Life"
Posts: 12,827
Images: 25
Re: Heading Alarm?

Off course alarm may be better as a boat at sea may slew off 30 or 40 degrees coming down a wave.
__________________
Notes on a Circumnavigation.
OurLifeAtSea.com

Somalia Pirates and our Convoy
MarkJ is offline   Reply With Quote
Old 23-01-2017, 07:32   #6
Registered User

Join Date: Jan 2015
Location: Victoria BC
Boat: 1980 Hunter 36
Posts: 933
Re: Heading Alarm?

Quote:
Originally Posted by twelve View Post
Anchor alarms galore–based upon position or depth–but I don’t know of a system that provides for a warning when the boat’s heading changes beyond a preset value. For wind and/or current shifts, a heading alarm may work best. Anyone know of a system that has this feature, or better yet, has anyone had experience with it? Thanks in advance.
My simrad NSS8 has this alarm and others (wind shift, off course etc). I don't tend to use it as where i am, the wind tends to be pretty squirrelly
__________________
S/V Gudgeon
www.gudgeonblog.ca
alctel is offline   Reply With Quote
Old 23-01-2017, 09:58   #7
Registered User

Join Date: Sep 2016
Posts: 10
Re: Heading Alarm?

Thanks all for responses. I am interested in a heading alarm which can be used at anchor. Course alarmsĖwhich have usefulness while underway but not at anchorĖare quite different. Chart plotters are generally only concerned with a boatís course, and as far as I know, donít have heading alarms. (Paul, I rechecked OpenCPN, and if itís there, I canít find it). Autopilots which steer a compass course might have audible alarms, but to leave one on at anchor overnight would likely require mechanical disengagement and/or significant power usage. My autopilot does not have an alarm feature.

But NavMonPC, clearly provides what Iím interested in. Thanks Paul, much appreciation for sharing your program. I am using Windows 10, and the program appears to run, but Iíve not yet figured out how to get data in. I donít see a capability in the program for input from a wifi sourceĖwhich I can do fairly easily for NMEA 183. Am I reading things wrong, or is there a solution? In the past on older machines Iíve used USB/serial port wired devices for NMEA 183, but the result has been less than reliable.
twelve is offline   Reply With Quote
Old 23-01-2017, 11:05   #8
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 4,597
Images: 4
Re: Heading Alarm?

Twelve, NavMonPc can connect to a WiFi (or any network) source that provides a NMEA0183 on TCP/IP server. NavMon does not handle UDP. You will need an IP address and port number for the WiFi server. What do you have now as your WiFi source?

NavMon doesn't do anything specific regarding WiFi, and treats this the same as a wired ethernet port -- your computer will need to connect to the WiFi server and then NavMon can connect to the IP address and Port #.

I realize that this is getting complicated, but if there is incompatibility, there are programs that can bridge the protocol / connection gap. OpenCPN has pretty flexible networking tools, and can also create a local TCP/IP port that NavMonPc can connect to.
__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Old 24-01-2017, 00:45   #9
Registered User

Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 4,571
Re: Heading Alarm?

Quote:
Originally Posted by twelve View Post
[SIZE=4]..... For wind and/or current shifts, a heading alarm may work best.....
Not so sure about that....

The android anchor pro app I use, plus opencpn watchdog allow you to create an area as opposed to a radius so if the boat leaves that area the alarm sounds.
So if the boat veers about a bit in a breeze the alarms doesn't sound, as it would with a heading alarm - but if the boat leaves the cone set between you and the anchor it will sound. Better option IMHO. The opencpn is option is very adaptable with inclusion and exclusion options.

conachair is offline   Reply With Quote
Old 24-01-2017, 01:23   #10
Registered User
 
UNCIVILIZED's Avatar

Join Date: Jun 2014
Location: Up the mast, looking for clean wind.
Boat: Currently Shopping, & Heavily in LUST!
Posts: 5,629
Re: Heading Alarm?

If you're wanting something to tell you when things go sideways when at anchor, literally or figuratively, why not just use an anchor alarm? And if needed, set it's radius a bit smaller than usual.


Also, please look into using a smaller font size.
__________________

The Uncommon Thing, The Hard Thing, The Important Thing (in Life): Making Promises to Yourself, And Keeping Them.
UNCIVILIZED is offline   Reply With Quote
Old 24-01-2017, 13:24   #11
Registered User

Join Date: Sep 2016
Posts: 10
Re: Heading Alarm?

Paul, thanks for the help. Iím a bit network challenged and just wasnít thinking the way you suggested. My system includes a Vesper XB8000 and OpenCPN on a Win 10 computer, and your program is now working fine. I hope to give the heading alarm a tryout in the next couple of months. Thanks again for your help.

Those who, I guess, donít know what Iím thinking, imagine this:


Youíre at anchor, itís 2200 and time to retire. The wind is so light that the rode is slack, but the boat is pointing southeast into the light surface current. The forecast is for a strong cold front to pass through within 12 hours, bringing north winds of 20+ knots. Your anchor is set with a long rode for those conditions, but often as a front arrives the wind clocks through almost the whole compass. Would you set an alarm? When do you want to be awakened and what type of alarm will do that?

Or this: Itís 1200, youíve just arrived, and now calmly anchored in a 150 foot wide cut between barrier islands with the ocean in sight. Thereís a 2 knot tidal current and other boats close by, some with two anchors. Youíre necessarily on a short rode, a single anchor, and sitting prettyĖat least for now. It will be 4 to 6 hours before the boat does a 180. You and the crew would like to get as much rest as possible before heading out for a night passage. Do you set the second anchor, an alarm clock for 4 hours, or a heading alarm?

The first scenario is very common during winter in the Gulf of Mexico, Florida, and the Bahamas. The second is a year round occurrence in that area. I suspect other cruising grounds have similar or other scenarios where you'd like to be alerted to anticipated changing conditions. Anchor alarms should not just be for the unexpected. Iíd like to know if a heading alarm will do the job.

Uncivilizied, the font on my previous posts was the default. I've reduced it for this one. I did not even notice the size difference from the responses. I only wish I had your vision.

twelve is offline   Reply With Quote
Old 24-01-2017, 15:24   #12
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 16,323
Re: Heading Alarm?

Hi, twelve,

If you don't automatically wake up from the change of motion when the 20 kn. change comes, and the motion changes, you're a far better sleeper than I am! (PLease, no offense intended.)

Seriously, for both situations, our [Vesper Marine] AIS's anchor watch function works. If you go outside the swinging radius you set, no worries, it shouts at us. However, for planned night time departures, we would set an alarm to wake us with time for a cuppa, and to dress, prior to getting the hook up.

Our AP does have an off course alarm, but it really is for when you're moving through the water on a specific course, not the right tool for an anchor watch.

Ann
__________________
Who scorns the calm has forgotten the storm.
JPA Cate is offline   Reply With Quote
Old 25-01-2017, 00:53   #13
Registered User

Join Date: Nov 2007
Location: Probably in an anchorage or a boatyard..
Boat: Ebbtide 33' steel cutter
Posts: 4,571
Re: Heading Alarm?

Quote:
Originally Posted by twelve View Post
You’re at anchor, it’s 2200 and time to retire. The wind is so light that the rode is slack, but the boat is pointing southeast into the light surface current. The forecast is for a strong cold front to pass through within 12 hours, bringing north winds of 20+ knots. Your anchor is set with a long rode for those conditions, but often as a front arrives the wind clocks through almost the whole compass. Would you set an alarm? When do you want to be awakened and what type of alarm will do that?

Or this: It’s 1200, you’ve just arrived, and now calmly anchored in a 150 foot wide cut between barrier islands with the ocean in sight. There’s a 2 knot tidal current and other boats close by, some with two anchors. You’re necessarily on a short rode, a single anchor, and sitting pretty–at least for now. It will be 4 to 6 hours before the boat does a 180. You and the crew would like to get as much rest as possible before heading out for a night passage. Do you set the second anchor, an alarm clock for 4 hours, or a heading alarm?
Both cases a boundary alarm would be a better choice imho, opencpn does this very well, quickly created example below. With even a light puff of breeze over a weak current your boat could be pointing any direction. It's not what direction the boat is pointing that's important but where the boat actually is.

conachair is offline   Reply With Quote
Old 25-01-2017, 01:58   #14
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 16,323
Re: Heading Alarm?

Mate, I haven't been where he is, but have faced similar situations. That boundary zone is lovely, and if you have the electricity to spare to run the computer all night, with the screen on, good on you.

We have relied so far on the AIS anchor alarm, which has served us well so far.

Ann
__________________
Who scorns the calm has forgotten the storm.
JPA Cate is offline   Reply With Quote
Old 25-01-2017, 02:30   #15
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 7,762
Re: Heading Alarm?

Quote:
Originally Posted by conachair View Post
B.........................It's not what direction the boat is pointing that's important but where the boat actually is.
It seems to me that the heading of the boat at anchor in the examples you gave would not necessarily be where the bow is actually pointed, no?
__________________

__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is offline   Reply With Quote
Reply

Tags
alarm, head

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Off-Heading Alarm RogerLloyd Marine Electronics 6 13-11-2015 08:06
car alarm as boat alarm? arjand Health, Safety & Related Gear 2 12-01-2013 03:31
Inexpensive High Water Alarm (and boat alarm) kiltym Marine Electronics 2 04-11-2012 09:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:07.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.