Subscriptions

Chart Subscriptions

Nautical charts called "TZ Maps" can be purchased on TZ iBoat by tapping on the “TZ” button located at the top left of your screen and selecting “Store”. Each TZ Map area includes Vector charts (or electronic chart) and Raster charts (digital copy of paper charts) on selected areas. Note that chart purchase is a one-year subscription that automatically starts with a 7-day trial allowing you to evaluate the data. After one year, the subscription will be renewed automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Charts are continuously updated during the subscription period.

If you decide to not renew the subscription, you will not be able to download or update the chart anymore (after the subscription period ends). Downloaded charts will remain usable on your device with the latest update done during subscription period, but if you reset your device or want to use a new device, you will have to renew your subscription to be able to download the charts again.

Premium Weather Subscription

In addition to the free weather forecasts (based on the GFS model), it is possible to subscribe to a Premium Weather service that adds high resolution and local weather models as well as near real-time rain radar and marine zone forecasts (text bulletins). The premium weather can be purchased using a monthly subscription that can be cancelled at any time. To purchase the premium weather subscription, tap on the “TZ” button located at the top left of your screen and select “Store”.

The Premium Weather service unlock the following features:

Improved Weather Forecasts

The premium weather service provides access to a higher resolution global model (ICON Global) and four higher resolution local models (NAM CONUS / Arpege / Arome / ICON Europe):

• The NAM CONUS offers coverage for North America at a resolution of 3 kilometers up to 2.5 days of forecast.

• The Arpege model offers European coverage at a resolution of 10 kilometers and up to 4 days of forecast.

• The Arome model offers coverage of French coasts and bordering countries at a resolution of 1 kilometer and up to 2 days of forecast.

• The ICON Global model offers a worldwide resolution at a 6 kilometers resolution (more than twice the GFS model) up to 5 days of forecast.

The premium weather service also offers access to 3 additional wave models.

Service	Weather (Free)	Premium Weather (Subscription)
Wind	25km	1km
	GFS (0.25*0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Wind Gust	25km	1km
	GFS (0.25*0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Pressure	50km	50km
	GFS (0.5 * 0.5)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Air Temperature	25km	1km
	GFS (0.25 * 0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Cloud	25km	1km
	GFS (0.25 * 0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Precipitation	25km	1km
	GFS (0.25 * 0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Humidity	25km	1km
	GFS (0.25 * 0.25)	GFS (0.25*0.25) ICON Global (0.125*0.125) ICON Europe (0.062*0.062) Arome (0.01*0.01) Arpege (0.1*0.1) NAM CONUS (0.3*0.3)
Wave (Significant)	50km	3km
	WW3 (0.5 * 0.5)	WW3 (0.5*0.5) Copernicus Global (0.083*0.083) Arome (0.02*0.02) Arpege (0.1*0.1)
Current	8km	8km
	(0.08*0.08)	(0.08*0.08)

 

Rain Radar

Unlike traditional weather forecasts that rely on models, the Rain Radar provides real observations. This data comes from an extensive network of weather radars covering a large part of the globe. The Rain Radar overlay displays active precipitation areas on your charts, almost anywhere in the world. By activating the animation with a simple click on the "play" button, you can watch the evolution of precipitation over the last three hours. This feature allows you to accurately anticipate precipitation movements, enabling you to know not only if you will be affected by the rain, but also when the skies will begin to clear.
 

Marine Bulletins (USA Only)

Important: Marine Bulletins are only available in the USA at this time.

Unlike model forecasts, which require personal interpretation, Marine Bulletins deliver expert interpretations directly to you. These bulletins are crafted by seasoned meteorologists from NOAA who analyze weather patterns and identify potential hazards, ensuring that you receive information that is both precise and actionable.
Moreover, Marine Bulletins goes beyond weather predictions: it includes specialized sections for alerts and tropical storms, providing timely warnings that are crucial for planning and response strategies.
With Marine Bulletins, you can navigate with confidence, knowing that you have the most accurate and up-to-date weather information at your disposal, analyzed by professionals to enhance your safety and decision-making on the waters.

Cancel a Subscription

If you need to cancel a subscription (charts or premium weather), you can do so from your device's Settings App. Press the “Home” button and open the Settings App:

Tap your Apple ID “card” with your name and profile image at the top of the menu:

Tap on Subscriptions:

You will see a list of all your active and expired subscriptions. If you want to cancel one, press the desired active subscription and then press Cancel Subscription toward the bottom:

Note that you will still be able to use the service (chart update or premium weather) until the end of the original subscription period.