SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electronics > Chartplotter at the nav station
 Not a Member? 


Thread: Chartplotter at the nav station Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
04-30-2014 01:40 PM
Shockwave
Re: Chartplotter at the nav station

We currently have navigation equipment below and sailing instruments above. We'll be changing this and installing navigation equipment at the helm and in the cockpit. I think much of this decision is how you sail, where you sail, your budget and personal preference, I don't think there is a right or wrong answer. Radar and AIS is a compelling reason for us to have chart plotters in multiple locations, we'll probably add AIS instrument below where they can be read while in a bunk.
04-20-2014 01:47 PM
TakeFive
Re: Chartplotter at the nav station

Quote:
Originally Posted by SVAuspicious View Post
What is the canvas in the pictures that are part of your signature?
That's the C250 version of a pop top. It requires pivoting the hatch up, which fully blocks the forward view and makes it unsuitable for sailing. It's strictly for on the hook and at the dock.

I have considered fashioning a dodger-like cloth that uses the stainless sub-structure of the pop top, but haven't come up with anything that wouldn't interfere with the winches.
Quote:
Originally Posted by SVAuspicious View Post
...I'm not familiar with the Catalina 250. The Catalina 22 in all it's manifestations, including the Capri, has plenty of room to walk forward on side decks. Do you have to step up from the cockpit seats all the way to the cabintop?..
Yes. In rough seas I crawl.
Quote:
Originally Posted by SVAuspicious View Post
...I agree with you about acknowledging alarms. PITA. I'd love to be able to set a mode that is "no alarms" - in good weather and lots of visibility I can see the 8-story slab of steel I'm passing. Sometimes I just turn the AIS off completely (New York Harbor, Annapolis anchorage, Thimble Shoals Channel, Charleston, Ft Lauderdale, Miami, ...) because the alarms become a bigger problem than the value-add of the data. I can always turn it back on...I'd love to have a simple flashing indicator in the databar rather than a beeping indication with a pop-up that blocks the screen...
OpenCPN, which is the chartplotter I run in my tablet, has highly configurable alarms which can greatly reduce the alarms. You can set limits on CPA, TCPA, audio/no audio, acknowledge timeout, distance of vessels, anchored vessel suppression, etc. You can even turn off the alarms completely. I have tweaked it to minimize the false alarms. But I do not want to turn it off completely because a couple times a year I will get a an alarm for a vessel coming directly behind me with a 5 minute TCPA, and turn around to see it there.

In my case the most common false alarm is a vessel coming "around the bend" whose 5-minute vector crosses my stern. I know he's not going to hit me because when he completes the turn to follow the channel he's headed another direction, but OpenCPN does not know that. That's an acceptable tradeoff for the benefits of the alarms, but I still need to have the tablet close enough to me to see what's going on.

The single greatest benefit of AIS for me is to show me that the vessels 2-3 nm away are actually anchored (as the vast majority are) and not moving. And to show me when they start moving (as they always eventually do).
04-20-2014 08:25 AM
SVAuspicious
Re: Chartplotter at the nav station

Quote:
Originally Posted by TakeFive View Post
My boat does not have a dodger because it's not big enough. There's not enough width to protect, and no side decks to step around a dodger.
What is the canvas in the pictures that are part of your signature?

Quote:
Originally Posted by TakeFive View Post
I also dislike instrument pods. In addition to blocking your view with unnecessary fiberglass, they make it even harder to get around the wheel on small boats like mine. I have an 8" tablet mounted at the helm on a RAM mount.
The RAM mounts are convenient, and there are a number of options to clip to the bows of a dodger.

I'm not familiar with the Catalina 250. The Catalina 22 in all it's manifestations, including the Capri, has plenty of room to walk forward on side decks. Do you have to step up from the cockpit seats all the way to the cabintop?

Quote:
Originally Posted by TakeFive View Post
Everything is a tradeoff, and in my case having the chartplotter close enough to see AIS icons and informational text, and to tap the screen to turn off collision warnings, is very important to me. If there are large ships close enough to set off alarms (which is unavoidable on a busy river), I cannot be leaving the helm to acknowledge alarms.
I agree with you about acknowledging alarms. PITA. I'd love to be able to set a mode that is "no alarms" - in good weather and lots of visibility I can see the 8-story slab of steel I'm passing. Sometimes I just turn the AIS off completely (New York Harbor, Annapolis anchorage, Thimble Shoals Channel, Charleston, Ft Lauderdale, Miami, ...) because the alarms become a bigger problem than the value-add of the data. I can always turn it back on.

Deliveries are easier as I'm likely to have a crew member that can be dedicated to hitting the acknowledge button.

I'd love to have a simple flashing indicator in the databar rather than a beeping indication with a pop-up that blocks the screen. The next meeting of the USCG GMDSS Task Force is coming up - I'll talk to my colleagues about whether we can encourage manufacturers to support that sort of mode.
04-19-2014 08:11 PM
SteveInMD
Re: Chartplotter at the nav station

I've been using GPS (in place of Loran) with paper charts from the early days of GPS, then GPS with a laptop chart plotting software, then chartplotters. I've found them to be totally reliable - period. I've experienced making mistakes with paper charts while plotting positions more often than any electronics glitches or failures. I am completely comfortable navigating with paper charts, but they just do not compare. Maybe someday my chartplotter will fail me, but so far it has not.

I like mine within easy reach from the helm.
04-19-2014 03:51 PM
TakeFive
Re: Chartplotter at the nav station

My boat does not have a dodger because it's not big enough. There's not enough width to protect, and no side decks to step around a dodger.

I also dislike instrument pods. In addition to blocking your view with unnecessary fiberglass, they make it even harder to get around the wheel on small boats like mine. I have an 8" tablet mounted at the helm on a RAM mount. It's all screen area with no buttons, so its profile is minimal. When I am sitting, it is above my line of sight. When standing, it is below my line of sight. I'll snap some pictures at some point. And it is quickly removable if I ever do want to get it out of my way. I can also rotate it to view from astride the wheel or forward of the wheel.

Everything is a tradeoff, and in my case having the chartplotter close enough to see AIS icons and informational text, and to tap the screen to turn off collision warnings, is very important to me. If there are large ships close enough to set off alarms (which is unavoidable on a busy river), I cannot be leaving the helm to acknowledge alarms. I've positioned the tablet so that it does not block my view makes it a no-brainer. But that's just for my own situation, and I continue to believe that there is no single answer that is optimum for everyone.
04-19-2014 01:56 PM
SVAuspicious
Re: Chartplotter at the nav station

Quote:
Originally Posted by TakeFive View Post
I think this thread highlights how greatly our use of chartplotters differs with our sailing range and objectives. An ocean sailor says, "Why would anyone need a chartplotter at the helm?" because there's almost nothing to bump into out there and he only needs to check it infrequently. Yes a shallow water sailor (like on the Chesapeake) needs it at the helm to avoid underwater obstacles.
I don't agree at all.

Perhaps I'm just easily distracted. *grin* ** -- oh look something shiny -- }

A chartplotter or paper chart (both are based on the same survey data after all, and resolution and accuracy can be no better than the survey) makes us aware of what we can anticipate. Neither is any substitute for a depth sounder, which should be visible from behind the wheel and from the principal watchstander spot in the cockpit. Heck, I have a repeater in the aft cabin next to my head which is useful at anchor, cruising the Chesapeake with Janet while I nap (I love Janet) in the afternoon, and offshore.

The chartplotter should NOT be at the helm for a couple of reasons: in most installations it blocks the helmsperson's view forward; and current generations (including mine, and I'm old) get distracted by the perceived reliability of the machine and fiddle with it too much.

Placing the chartplotter under the dodger (preferably to port) puts it in the spot most accessible to a watchstander (formal or not) while the autopilot is steering. It is more visible to other crew. It is protected from weather by the dodger. Unless your vision is even more awkward than mine you can see it from the wheel (I use 6 nm range for general sailing, 3 nm (usually) for inlets, and 1-1/2 nm (usually) for close quarters); it is best to keep your head outside the boat and pay attention to marks and landmarks and not the 'video game' that is the chartplotter.

I'm definitely an offshore guy. No question. We spend a huge amount of time gunkholing in the Chesapeake and I have never regretted putting our chartplotter under the dodger. I do plenty of deliveries and have a lot of personal opportunities to compare navigation instrument positioning. The "stack" (as Jon Eisberg calls it) at the helm is about the worst I can think of whether inshore, coastal, or offshore.

I know some boats don't have dodgers (which gobsmacks me). In that case, the swing out mounts in the companionway are probably the best solution.

My, hopefully educated and somewhat experienced, opinion.
04-19-2014 10:58 AM
svHyLyte
Re: Chartplotter at the nav station

For what it's worth, we have a large Garmin chart plotter at our navigation station below (where we always have paper charts laid out for the area we're traveling for comparison), and a second 3205 Garmin at the helm station that can be dismounted when not needed. Both units are wired to allow them to feed data to our computer at the navigation station if/when needed. The helm station display is very useful and especially so for my (much) better half who sometimes has difficulty steering to a compass course but has no difficulty "follow(ing) the arrow" or "stay(ing) on the highway", both display options on the 3205. The 3205 displays AIS data which allows one to "see" approaching traffic and can be linked to one's radar and depth sounder/fish finder if desired. The foregoing arrangement has proven very satisfactory. Notably, several of our friends that decried the usefulness of a chart plotter at the helm installed one of their own after traveling with us.

FWIW...
04-19-2014 09:52 AM
PBzeer
Re: Chartplotter at the nav station

Quote:
I think he was referring to how the chartplotter helps him avoid running aground.
I understand that. For myself, I find the depth sounder far more of a reliable instrument than a chart which may or may not be accurate. That's why I plan ahead.
04-19-2014 08:40 AM
LinekinBayCD
Re: Chartplotter at the nav station

As a coastal cruiser I prefer the chart plotter at the helm (a fixed mount with radar in my case, a Garmin 3006). Down below if I need to check position / course I'll use either a handheld Garmin Oregon 400c or GPSMap 478 kept as backups or the ipad or iphone with Garmin apps. I prefer the redundancy of separate systems rather linked units where one might be dependent on the other.
04-18-2014 09:26 AM
TakeFive
Re: Chartplotter at the nav station

I think this thread highlights how greatly our use of chartplotters differs with our sailing range and objectives. An ocean sailor says, "Why would anyone need a chartplotter at the helm?" because there's almost nothing to bump into out there and he only needs to check it infrequently. Yet a shallow water sailor (like on the Chesapeake) needs it at the helm to avoid underwater obstacles.

I sail on a river with potential for lots of commercial traffic. I like having my "chartplotter" at the helm to show me where/when the big freighters are coming from, or whether they're just anchored on the horizon. I get frequent AIS alarms and need to tap the "acknowledge" button to turn the alarm off. If I had to leave the helm to walk up to the companionway every time an alarm went off, it would create a hazardous condition. I need to have it at the helm.

Since I tack frequently (otherwise I'd run into the sides of the river), I use my chartplotter to give crew a "2 minute warning" of upcoming tacks. My software projects a vector in front of my boat indicating where I'll be in 2 minutes, so as soon as that vector hits skinny water, I give the warning to my crew. This allows me to use as much as possible of the river's limited width.

FYI, I don't have a real "chartplotter." I use a Windows 8 tablet running OpenCPN to display GPS and AIS, and a separate handheld GPS as backup and for recording my tracks. It has a lot of really nice features, including the configurable alarms and prediction vectors.
This thread has more than 10 replies. Click here to review the whole thread.

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 07:51 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.