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Day Skipper - Part 4 - Chart
symbols
The authoritative guide to chart symbols is Admiralty Chart 5011, which,
in fact, is not a chart, but an A4 booklet with a description of every
symbol in use. Although not a particularly riveting read, it is a very
useful reference book to keep on-board with your charts.
The majority of people miss the vast amount of information printed on
a chart. Not only can it show obvious elements such as land and sea, it
also shows depths of water and heights of land, speed and direction of
tidal streams, dangers, safe areas, channels and so on.
These are just a few symbols to be found in Chart 5011
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Dangerous
underwater rock
of known depth |
Dangerous
underwater rock
of known depth
considered dangerous
to surface navigation |
Rock awash
at the level of
Chart Datum |
Rock which covers
and uncovers,
height above
Chart Datum |
Rock which
does not cover,
height above
High Water |
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Wreck which has been swept by wire to the depth shown |
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Wreck over which the depth has been established by
sounding
but not by wire sweep |
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Wreck over which the depth has been established by
sounding
but not by wire sweep |
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Wreck of which the mast(s) only are visible at Chart
Datum |
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Wreck showing any part of the deck or superstucture
at Chart Datum |
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Eddies.Swirling
areas of water |
Tidal Diamond.
One means
of determining
tidal direction
and speed |
Coastguard
Station |
Lifeboat or
Rescue Station |
Yacht Harbour
or Marina |
Visitors' berth |
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Radio reporting
point (in direction
of arrow) |
Floating mark with a
radar
transponder beacon |
Overfalls, tide rips
or races. To be
avoided |
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