Tide Predictions for Anchorage and Cook Inlet
Why Cook Inlet’s huge tidal range, shallow water, and tidal bores challenge ordinary tide clocks, and how NautiKron calculates the local tide.
Read guideAutomatic GPS Tide Clock
Accurate tide predictions for U.S. coastlines and territories, without Wi-Fi, an app, or complicated setup.
For boaters, coastal homeowners, beachcombers, and anyone whose day follows the tide.
$400
View on EtsyHandmade on Whidbey Island, WA USA 400+ Etsy sales 80+ ★★★★★ customer ratings
Traditional mechanical tide clocks approximate one repeating cycle. NautiKron uses GPS location and built-in NOAA harmonic data to calculate the tide hour by hour.
“Clean appearance and accurate tide.”
— NautiKron buyer
Field guides
Understand the science and rhythms behind this timepiece.
Why Cook Inlet’s huge tidal range, shallow water, and tidal bores challenge ordinary tide clocks, and how NautiKron calculates the local tide.
Read guideLearn how mechanical and data-driven tide clocks estimate the rise and fall of the sea, and where their predictions differ.
Read guideTraditional tide clocks assume a repeating semidiurnal cycle. Learn why local harmonics and subordinate stations make real tides more complex.
Read guideWhy Puget Sound needs a location-aware tide clock, how its mixed tides vary by port, and what to look for in a useful display.
Read guide