Chart datum

[Jack Sparrow]

Got a question again, as usual with me

 

I am new to sea charts, and im just wondering what is actually meant by CHART DATUM and how it relates to tide depths in a particuler area, ie Plymouth

 

Once again in advance

many thanks

Regards

JS

[gannet]

Hi Jack. Chart Datum is, basically the depth at low water spring tides ie the lowest tide you are ever likely to experience. Tidal heights shown on Tide Tables for say Plymouth are the heights of tide above the Plymouth chart datum. Hope this helps.

[Jack Sparrow]

Cheers mate, thats a big help, im just trying to find my way around them, so may have one or two other questions, its a bit like first seeing an ordance survey map for the first time.

 

Regards

Jack

[Norrie]

Cheers mate, thats a big help, im just trying to find my way around them, so may have one or two other questions, its a bit like first seeing an ordance survey map for the first time.

 

Regards

Jack

 

Hi Andy, you have a PM mate :)

[Jack Sparrow]

Hi Andy, you have a PM mate :)

 

 

Cheers Norrie you've been a huge help and its greatly aprecaited

 

regards

jack