Does any chart software show depth versus tide?

[hellosailor]

It may sound pointless or even counterproductive, but this morning I was looking at a chart and wondering about "Can we clear..." which always means manually looking at the tide and then compensating the tidal range into the charted depth.

You know, if the chart says 5' clearance at MLW but there's a 6' tidal range and you'll be passing through at high tide, you've got 11' of depth, not five. Make a mistake and you go crunch. (Knock wood, not yet.)

Then I started to wonder, is there any modern software that will display the official depths, with an option to CHANGE those based either on the current time's predicted tidal range, or based on "You'll be there at ten o'clock and at that time the depth will be..."

Yeah, I know, plenty of room for liability issues and plenty of ways to get in trouble. But the thought occurred to me...I haven't seen this, and it would be SO easy to implement in chart programming, where depth information is just one more layer of discrete overlays.

[ranger58sb]

Not sure it's an answer... but we can turn on (predicted) tides and currents in our plotter (NAVNet 3D) and our companion laptop software (TimeZero). Knowing tide times, and knowing tidal range in a given area (a separate look-up, from elsewhere; Coast Pilot, maybe), I can tell sorta kinda how much to add or subtract. The usual amount of Zen is involved...

-Chris

[jkleins]

Navionics app does just that if you select the tidal station. The display changes to show the predicted depth at the current time or any other time you want to scroll the display to.

[psk125]

You could program this into your phone, most likely:
https://en.wikipedia.org/wiki/Rule_of_twelfths

works worldwide!