Please select your home edition
Edition
Barton Marine 2019 728x90

Sail clear of these three dangerous wreck symbols!

by John Jamieson on 29 Mar 2013
Three wreck symbols SW
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.

But beware...

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!
Sea Sure 2025RS Sailing 2021 - FOOTERNorth Sails Loft 57 Podcast

Related Articles

SP80 kiteboat reaches a top speed of over 58 knots
100 km/h barrier is smashed in Leucate The SP80 kiteboat has reached a top speed of over 58 knots, or 108 km/h. This new personal best makes SP80 the second fastest sailboat ever recorded, behind Vestas Sailrocket II and its 68.01-knot top speed.
Posted today at 10:04 am
Italian SailGP Team acquired by investors
The consortium includes Hollywood royalty, Anne Hathaway SailGP has today announced that the Red Bull Italy SailGP Team, has officially been acquired by a consortium of accomplished investors and sports industry leaders, including Hollywood royalty, Anne Hathaway.
Posted today at 8:53 am
Armstrong Foils: On tour - Home of Armstrong II
Join America's Cup champion, Blair Tuke and Armstrong team riders on the tour of NZ's Far North Join three times America's Cup champion, Blair Tuke and Armstrong team riders Olivia Jenkins, Naumi Eychenne, Bowien van der Linden, Cash Berzolla, and Reo Stevens, on the Home of Armstrong Tour II, as they explore NZ's Far North.
Posted today at 4:46 am
America's Cup entries open on Sunday
A Cup in turmoil - has Grant Dalton dodged a bullet with the new Cup organisation? America's Cup gets underway in Rome with Round 2 of the official welcoming ceremonies on Wednesday in Naples. Emirates Team NZ CEO Grant Dalton apprears to have dodged a bullet with the formation of of new AC organising body.
Posted on 26 May
Italian PM welcomes America's Cup in Rome
Prime Minister Meloni set out a bold vision for the regeneration planned around AC38 The magnificent setting of the Casino del Bel Respiro, commissioned by Pope Innocent X in 1644, in the grounds of Villa Pamphilj, was the outstanding and historic setting for the formal presentation of the Louis Vuitton 38th America's Cup.
Posted on 26 May
Giorgio Armani Superyacht Regatta preview
Sørvind to debut at this edition, in Sardinia The Mediterranean superyacht racing season will kick off on 27th May with the Giorgio Armani Superyacht Regatta, organised annually by the Yacht Club Costa Smeralda since 2008 and supported by title sponsor Giorgio Armani since 2022.
Posted on 26 May
Winning Sails for Every Sailor & Every Program
Beer cans or the big leagues, North Sails perform From one design sails to custom inventories, trust the experts at North Sails to elevate your performance.
Posted on 25 May
72nd Melbourne to Apollo Bay Race overall
MRV stifles Ambition to take line honours and overall win Margaret Rintoul V (MRV), skippered by Damien King from the Sandringham Yacht Club (SYC), has sailed a fast and furious race to win the 72nd Melbourne to Apollo Bay Race (M2AB).
Posted on 25 May
The link between two great Australian sports
A unique connection between brute strength and beauty James Joseph Giltinan was one of Australia's great entrepreneurs of the early 1900s, and the man most responsible for creating a unique link between one of the most confrontational football codes in the world and the beauty of sailing.
Posted on 25 May
Records smashed at SCIBS 2025
Officially the Largest Ever Sanctuary Cove International Boat Show Massive crowds enjoyed a spectacular 36th Sanctuary Cove International Boat Show with a record number of boats delivering an unsurpassed display of marine innovation, luxury and lifestyle.
Posted on 25 May