sail-world.com -- Sail clear of these three dangerous wreck symbols!
Sail clear of these three dangerous wreck symbols!
Fri, 29 Mar 2013
Look at most any nautical chart and you will find symbols that signify dangerous wrecks. Here are three wreck symbols to get you started on the road to navigation safety wherever you sail.
1. Wreck Not Dangerous to Surface Navigation--but Still a Danger! This symbol shows a wreck that has been determined not to be dangerous to surface navigation at all stages of the tide (high water and low water). Note that this wreck symbol has not been surrounded by dots.
You can plot a course over this charted wreck symbol and be confident that your keel, rudder, or propeller shaft will not be damaged. So why do cartographers (chart-makers) bother to put these onto your chart?
For the sailor, you would not want to anchor anywhere near a non-dangerous wreck symbol. If your anchor dragged just the slightest distance, it could become fouled (snagged or caught) on the wreckage or pieces of the wreckage. Wrecks tend to shift position, so it's best to stay well clear.
On the commercial side, fishing vessels that use bottom nets want to know where these wrecks are to avoid the possibility of snagging their nets as they trawl along the bottom. That could end up costing them thousands in repair or replacement costs.
2. Dangerous (Sunken) Wreck Hazardous to Surface Navigation: This symbol shows a wreck that has been determined to be dangerous to surface navigation at all stages of the tide (high water and low water). You can tell this because the fishbone symbol has been surrounded by dots.
Charted symbols surrounded by dots ramp up the level of danger to your boat. Plot your course to keep clear of these underwater 'boat back-bone breakers'!
3. Wreck Showing Any Portion of Hull or Superstructure:
This symbol looks like part of a ship or boat that sticks out of the water at all stages of the tide (high water and low water). The half-hull wreck symbol tells you that at all stages of the tide, some portion of the hull or superstructure will be visible.
At higher high tides, there may be just the slightest bit of wreckage above water. And it could be obscured by waves or low visibility conditions (or darkness). These dangerous wrecks have their positions indicated by the small white open circle (note the circle at the base of the charted symbol). Avoid these monster hazards like the plague to prevent serious damage or injury.
Know the common chart navigation symbols like these used on nautical charts and plotters throughout the sailing world. Sail clear of these dangers to keep your sailing crew and sailing boat safer this coming sailing season--wherever in the world you choose to sail or cruise!
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 www.skippertips.com. Sign up for the Free, highly popular weekly 'Captain John's Sailing Tip-of-the-Week'. Discover how you can gain instant access to hundreds of sailing articles, videos, and e-Books!
Onesails.com - Workforce
OneSails is the culmination of over 35 years of experience accumulated by our team in design and technology applied to sail-making. [More info]
Burke Marine, suppliers of international quality marine clothing and equipment, was founded by Martin Burke on the shores of Sydney Harbour in 1971. Visit our website for your nearest stockist. [More info]
Ensign Ship Brokers
Ensign Ship Brokers was established in 1980 and has spent the last 28 years expanding our marine knowledge and developing our reputation! We strive to provide the very best service! [More info]
GME Standard Communications Pty Ltd
Leaders in communications and navigation. Their goal has always been to make products whose innovation, convenience and peace of mind can help improve the lives of their customers. [More info]
Henri Lloyd was established in 1963 in Manchester, England. Mr Henri, as he became universally known, founded the company based upon hard earned principles of honesty, integrity and freedom. [More info]
Navionics is proud of its superb cartographic database comprising more than 25,000 charts and port plans; the largest privately owned database of its kind, the only one using full seamless technology [More info]
Ullman Sails Australia
The Ullman Sails Australia team provides service to customers all over Australia with four main locations in Brisbane, Perth, Sydney and the Whitsundays. [More info]
Vicsail Sydney Pty Ltd, launched into the Australian sailing fraternity in 1983 and has been sailing strong ever since. At Vicsail, “We Sail the Boats We Sell”. [More info]