sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Use These GPS 'Safety Circles' for Easy Navigation!
Use These GPS 'Safety Circles' for Easy Navigation!


'Separate circles'    Captain John Jamieson

Imagine sailing along a coastline in good conditions. Suddenly fog, thicker than pea-soup or New England chowder cloaks your boat beneath a shroud of mist. Shoals pockmark the sailing route to starboard. Discover two ways to use your GPS to avoid grounding or damage to your hull, keel, rudder or propeller.

Set a waypoint into your GPS to mark nearby navigational dangers. Your nautical GPS will allow you to scribe an electronic 'circle' with a pre-determined radius. Enter this radius in tenths of a nautical mile. Touch the circle as you sail by and an alarm will sound. Make that circle radius large enough to give yourself time to sail toward safer water. Follow these easy sailing tips to discover two ways to do this:

Program Separate GPS Proximity Circles of Safety (image above):

1. Scan the sailing route to port, starboard and ahead. Look for rocks, wrecks, underwater obstructions (i.e. piles, stumps, dumping grounds, fish havens). Highlight each hazard on the chart or plotter screen. Use any color except red or yellow (both are difficult to see under red night lights). Now you will be able to spot the hazards at-a-glance in any weather, day or night.

2. Mark the center of each separate shoal or hazard with a waypoint. Label the waypoints with an alphanumeric character for easy identification and cross-reference with your GPS (i.e. H-1, H-2, H-3). Enter the latitude and longitude into your GPS. Measure again to make sure that no number has been transposed.

3. Determine a safe radius from each waypoint that will clear the hazard plus allow a margin of safety. Note in the illustration, we have determined a one nautical mile radius for each danger circle. You may find that some hazards require more or less. Allow a large margin of safety so that you have time to head up, bear away, tack or jibe as required to sail for safer water.

4. Enter this radius into your GPS 'distance to waypoint' function. It may have a different name, but will give you the option to enter a radius in nautical miles and tenths of a nautical mile. Your GPS alarm will trigger if you touch the edge of this virtual 'circle'. If your unit allows just one waypoint alarm at a time, choose that waypoint that represents the greatest threat to sailing safety. Reset the alarm to trigger at the next waypoint after you pass the first one.

5. Log your information. Whatever you have entered into the GPS, write down into the navigation log for future reference. Include waypoint name, description, latitude and longitude, and safety radius entered for each separate hazard. Now, if your GPS fails, you can enter the info into an alternate secondary GPS (or other device) in just a few minutes.


GPSProx-SingleCircle -  Captain John Jamieson  
Program Single GPS Proximity Circles of Safety

1. Scan the sailing route to port, starboard and ahead as described earlier. Highlight rocks, wrecks, underwater obstructions (i.e. piles, stumps, dumping grounds, fish havens).

2. Estimate the approximate center of the cluster of dangers (see illustration). Give your waypoint an alpha-numeric name. Enter the latitude and longitude into your GPS. Measure again to make sure that no number was transposed or an error was made when measured.

Scribe a circle that encompasses all hazards. Adjust this circle so that you have a generous amount of room to take action. If your GPS alarms, you want plenty of time to head up, bear away, tack or jibe as needed to sail for deeper water. Enter this radius into your GPS and set the alarm.

3. Make a log entry into your ship's navigation log as described above. This will save you time and effort in case your GPS or plotter loses data. That way, you can transfer the information fast and easy to a backup plotter or GPS in just a matter of minutes.

~~~~~~~~~~~~~~~~~~~~

Use easy sailing navigation techniques like this to make sailing or cruising safer and easier. Keep your sailing crew safe and sound on the waters of the world--wherever you choose to sail!

John Jamieson (Captain John) with 25+ years of experience shows you the no-nonsense cruising skills you need for safer sailing worldwide. Visit his website at https://www.skippertips.com and sign up for his highly popular Sailing Tip of the Week. Discover how you can gain instant access to hundreds of sailing articles, videos, FREE e-Books and much more!


by John Jamieson


  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=119390

3:56 AM Tue 18 Feb 2014GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







News - USA and the World

















AWT Quatro Desert Showdown at Punta San Carlos by American Windsurfing Tour,
















America's Cup: Rod Davis - Time for a change after ten years with team *Feature by Richard Gladwell/Sail-World.com/nz,








Maxi yacht rendezvous this September in Sardinia by International Maxi Association,




















America's Cup: Team NZ wish Davis well with new team *Feature by Richard Gladwell, Sail-world.com/nz,


Fisher's View: Sailing perfection at Hamilton Island- Day 3 by Bob Fisher, Hamilton Island, Queensland




2014 Formula Kite World Championship Day 1
IFDS World Championship - Day 1 images by Jude Robertson
Volvo Ocean Race: Forget the f-word - Team SCA profiled
52 Super Series - Fleet grows, 2015 dates revealed
420 and 470 Junior Europeans - Teams from 9 nations on the podium
IFDS Worlds - Former president presented with ISAF awards medal
Nanjing Youth Olympic Games - Improvements aplenty in Byte CII fleets
America's Cup: New Zealand loses top coach to Artemis Racing
Volvo Ocean Race 2014-15 CEO Knut Frostad talks (Part I) *Feature
Sevenstar Round Britain and Ireland Race Day 9 - Swish on record pace
2014 CORK Olympic Classes Regatta - Day 3
2014 Nanjing Youth Olympic Games - Day 2
2014 IFDS World Championship: Opening Ceremony images
Opera House Cup - Images by Ingrid Abery
Teams descend upon Cowes for inaugural J/111 World Championships
Hamilton Island Race Week: Everywhere there's smiley people
IFDS World Championships - US Paralympic hopefuls ready for racing
Sopot Match Race - Poland's Tour debut deemed a triumph
Vineyard Race celebrates 80th running of the East Coast classic
Nanjing Youth Olympic Games: Young sailors begin racing on Lake Jinniu
AWT Quatro Desert Showdown - Victory for Morgan Noireaux   
Sevenstar Round Britain and Ireland Race - Day 8: Test of endurance   
Bart's Bash: Over 2300 entered from 588 yacht clubs - Join here   
Halifax ready to welcome the world at 2014 IFDS World Championships   
RC44 World Championship title to Bronenosec + Video   
Audi Hamilton Island Race Week: Day 2 Images by Crosbie Lorimer   
IFDS Worlds - Gary Jobson to attend opening ceremonies   
Melges 32 U.S. National Championship - Dalton DeVos crowned champion   
2014 Nanjing Youth Olympic Games trailer   
2014 Chicago Grand Slam - Canfield wins   
Round Britain and Ireland Race - Varuna takes overall lead   
Audi Hamilton Island Race Week; Crosbie Lorimer Day 1 Images   
Fisher's View: Hamilton Island Race Week - Day 1 - Stayin' Alive   
CORK Olympic Classes Regatta 2014 - Day one   
Youth Olympics: practice over, athletes welcomed, time for YOG sailing   
Round Britain and Ireland Race - Record for Artemis-Team Endeavour   
2014 Melges 32 U.S. National Championship - Day 2   
Sevenstar Round Britain and Ireland: Artemis sets fourth course record   
2014 Chicago Grand Slam - Top seeds survive as semi-finalists   
420 and 470 Junior Europeans - Breezy day 4 in Gdynia   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL WAS US
LocalAds   DE  ES  FR  IT