enc chart depth numbers upper and lower?

[sdowney717]

basic question.
The numbers show low tide water levels?

what does the lower letter next to the number mean?
I have seen 'g' and some numbers I think.

[sdowney717]

ok loaded a picture to show you

next to the depth number at an angle
what is 'g' or is it a '9'?
what is '8'
what is '1'
etc...
compared to the depth it must have some meaning

[four winds]

The "g" is a "9".

That is the way decimals are displayed. 12.9 meters, 14.1 meters, etc.

[lolarose]

Originally Posted by sdowney717

ok loaded a picture to show you

next to the depth number at an angle
what is 'g' or is it a '9'?
what is '8'
what is '1'
etc...
compared to the depth it must have some meaning

for heaven sake. after reading this, i am definitely going to sell my boat.
i will print this, frame it and hang on my living room wall.

[GPSNavX]

Soundings

[sdowney717]

thanks, so 131 means 13.1 feet 88 means 8.8

this should be for low tide readings?

[cagney]

Enc charts just adhere to standard chart conventions regarding depth figures etc. Paper charts looks just the same.
I think that you could benefit greatly from reading up on basic navigation.
Consider reading and learning from a good navigation text. Please make sure you understand everything in a chart, before heading out next time!

[four winds]

Originally Posted by sdowney717

thanks, so 131 means 13.1 feet 88 means 8.8

this should be for low tide readings?

I think that is for MLW , mean low water. Not necessarily low tide, I think.

Someone will correct me it I'm wrong.

[conachair]

Originally Posted by four winds

I think that is for MLW , mean low water. Not necessarily low tide, I think.

Someone will correct me it I'm wrong.

Near enough.
It's chart datum. Usually lowest astronomical tide (LAT) in tidal waters. According to IHO, prob same in US.

All you need to know here.

U.S. Chart No. 1

or here

Downloads for IHO Member States and Subscribers

It's a good idea to check if the depths are metres or feet

[four winds]

I was going to recommend Chart 1 also, though I forget some of it.

I think MLW applies to rivers in the US.

It's all a blur to me, learning(remembering) all this at an older age is a challenge for me.

[jackdale]

Originally Posted by four winds

I think that is for MLW , mean low water. Not necessarily low tide, I think.

Someone will correct me it I'm wrong.

Mean lower low water - but always check the title block of the chart to verify.

[jackdale]

Originally Posted by conachair

Near enough.
It's chart datum. Usually lowest astronomical tide (LAT) in tidal waters. According to IHO, prob same in US.

Not all countries use the same chart datum. Canada uses Lowest Normal Tide.

[boatman61]

To the best of my memory depths are shown at MLWS or Maximum Low Water Springs...
In other words... it may be this... but it could be less...