Tide Now: San Juan Islands Tides and Currents

聖胡安群島的離線潮汐和海流應用程序

The San Juan Islands in Washington State, USA, is a boating paradise. This app provides tide and current predictions for the area. There are 41 tide stations and 55 current stations.

The predictions are immediate. There is no loading from the internet, all tide and current data are built into the app.

The chosen area is covered by the nautical chart #18421 "Strait of Juan de Fuca to Strait of Georgia". You can view the selected station on this chart, initially displayed in full, you can zoom and pan to see full detail of the chart.

A date entry screen allows you go see the prediction for any date. You can also swipe left and right to go forward and backward a day at a time.

There is a favorites system, you can save up to eight locations for immediate access by a down swipe.

Full sun and moon information is available if desired, you can also just show the daylight range, or simply the tide table and graph by itself.

To select your desired station, use the location button. A list of regions

will be displayed. For current stations, the region names are bodies of water,

such as Strait of Georgia - Currents. For tide stations, the region names

are land areas such as Strait of Georgia - Tides.

Choose one of these, and a list of stations is displayed. Choose a station,

then the tide or current table for the present date will be calculated and displayed.

To verify the station location, you can use the command "Show Station on Chart". A display is produced showing the entire San Juans nautical chart, which includes an inset station name, and line to the location, and a dot representing the station. The map is small but it shows the location within the entirety of the San Juans. At that point, you can use pinch and pan gestures to zoom into the station and see the chart detail as you wish, there is sufficient chart resolution during zoom to show the full detail as on the original chart. Use the system back function to resume to the tide or current graph. The DONE button is not implemented.

Various other commands are provided using the ... menu.

You can add the currently selected station to the favorites list.

You can show the station on a google map representation, in a variety of scales, the station location is centered on the display.

You can show the station on a nautical chart as described above.

You can change the display arrangement to bright, dark, or various colors.

You can adjust the sun and moon information displayed to one of three levels.

You can place a marked height on the display, this will allow you to see approximate times when the tide crosses selected height.

You can make an overlay waveform, which shows the waveform from two locations for comparison.

An about gestures command reminds you of the three primary gestures available in the tide station repot.

Finally, a contact info command provides you my email address, you are welcome to contact me with questions or suggestions.