Navionics tide info

[billows]

I notice for today low tide in Cobh Cork harbour on my navionics app is .25m whereas on windfinder and other tide apps the low tide value is 1.1m
What am I missing?

[willk]

Originally Posted by billows

What am I missing?

You've been shortchanged outta 0.85m!

That's the difference getting out of Fahan Marina and a day in the pub.

[billows]

Originally Posted by willk

You've been shortchanged outta 0.85m!

That's the difference getting out of Fahan Marina and a day in the pub.

Eh dont give up the day job
Can anyone explain, low tide heights are kinda important as a lot of ribbers with busted props will testify

[willk]

Originally Posted by billows

Can anyone explain, low tide heights are kinda important as a lot of ribbers with busted props will testify

Well, tides are estimated and v. dependant on Pressure and Wind direction/speed, so I'd be wary of using 0.85m as a prop guard. The variation may be down to the different platforms using different algorithms* to calculate tidal heights, different datum points and possibly (more likely) in this case, different times, i.e. summer/winter - have you checked? Also, your plotter software may need updated? For the craic, compare tidal peaks on printed charts to various electronic sources - they will likely all vary a tad.

*The prediction of Tidal data made by viewing the movements of seaweed...

[billows]

Different datum maybe but how could time reference explain the minimum depth displayed as reached?