International support - v3.20

International Charts

Nautical chart imagery for non-USA waters has been added for some locations.

USA Tides and currents refresh

All of the USA tides and currents are now updated to the latest NOAA December 2025 data release. Tide and current data is available between the dates of 2020.01.01 through 2040.12.31 inclusive.

Thanks, as always to David Flater (xtide) for collecting and publishing the .tcd files which I use to generate the millions tide fragment files which enables DeepZoom’s rapid display.

I would be delighted to extend DeepZoom tide and current coverage throughout the world.
If you know of any public domain harmonic current sources please let me know!

International tide stations added

TICON-4

Magnetic Variation update

DeepZoom optionally displays the magnetic heading for each leg of a route (see the Settings page). The model used to compute this value has been updated to the World Magnetic Model 2025-2030. (NOAA)

Serenade is for sale

It is with great sadness that we’ve decided to put Serenade up for sale. Serenade is a 1997 40’ Pacific Seacraft cutter designed by Bill Crealock. We have been through so many adventures together and I cand vouch that Serenade is a sturdy and stalwart companion.