Hawaii has about a 2' daily tide. Highs and lows do not require much interpretation. My sailboat at the Ala Wai harbor goes up and down with very little relative motion to the pier and of course no current.

But, the rivers and bays in Oregon have a 7' foot daily tide! There is significant changes in depth and current direction. Flying my little seaplane in these brackish waters requires a little extra planning to be safe.

Here we see low tide with the flood starting:


To sort out the complexity I use Garmin "Blue Water" nautical charting software to get realtime prediction on water movement:



Also the depths, buoys, and day markers come in handy:


The airspace planning is done on ForeFlight:


The very nice feature of the iPAD is I can switch between ForeFlight and Garmin "Bluewater" in the cockpit and have realtime GPS navigation in the air and on the surface.

Cool! Now you can leave Ports & Passes at home!

Cary

You can also get a blue water chip for the 296, 396, 496 and toggle between them, which is handy. The Kachemak Bay will get 25 foot tide swings. The trick is basically to plan your trips to land at mid-tide rising.

Headoutdaplane wrote:You can also get a blue water chip for the 296, 396, 496 and toggle between them, which is handy. The Kachemak Bay will get 25 foot tide swings. The trick is basically to plan your trips to land at mid-tide rising.

25' is a major tide. Very dangerous if not predicted correctly!

Thank you for the reminder, I agree with mid-rising tide arrival. Garmin multi layer charts; celestial, airspace, terrain, nautical and bathymetric are useful.