Depths on charts.....in brackets......fastest finger first!

M

Matata

Well-Known Member
Joined
5 Jan 2009
Messages
402
Visit site
I nearly understand depths and drying heights! If a depth is recorded with a line below it then that is its depth ( height)at chart datum. What does it mean if there is also a set of brackets around it and a line under it? Ta Nik
 
Matata said:
I nearly understand depths and drying heights! If a depth is recorded with a line below it then that is its depth ( height)at chart datum. What does it mean if there is also a set of brackets around it and a line under it? Ta Nik
Click to expand...

Depths are shown in metres, or metres and tenths of a metre, below chart datum as plain numerals, plain numerals and decimals or plain numerals and a subscript

Drying heights , above chart datum, are underscored

Depths are enclosed in brackets when the figures are displaced from the point to which they refer . eg (147) may refer to the depth of 14.7 m in a nearby narrow channel
I assume the same applies to drying heights although it is not specifically shown in 5011

The 2008 edition of Chart 5011, Symbols and Abbreviations used on Admiralty Charts is available on line as a pdf https://facebook.ereportz.com/Apps/fileshare/download/ZmlsZV8xMTMxNDA2MDg3NzA1MzdfMzM1NF8yLnBkZg==
 
Last edited:
Cooh Vic I didn't even get the kettle on!! Why would the depth not actually be charted at the narrow channel?
 
Matata said:
Cooh Vic I didn't even get the kettle on!! Why would the depth not actually be charted at the narrow channel?
Click to expand...

For clarity .
Clearances under bridges etc is another example where the figure may be enclosed in brackets and displaced from the point to which it refers.
 
You must log in or register to reply here.

Other threads that may be of interest

T
Notices to Mariners - Week 49
Replies
0
Views
791
tillergirl
T
T
Notices to Mariners - Week 50
Replies
2
Views
642
tillergirl
T

Share this page

Top