YB3i User Manual


User Interface

The YB3i has no user interface as such. When the device is activated on the PredictWind Satellite Portal, and powered with 9-30 VDC, it automatically sends GPS data to the PredictWind GPS tracking page every 2 hours. Please contact PredictWind with your boat name and PredictWind login email address to get your GPS tracking page setup, you will need a Standard or Professional PredictWind forecast package for this.


Your unit is equipped with both Iridium & GPS antennas located on the top ‘domed’ part of your casing. For the best results, it is important to be mindful of the orientation of your device when in use. To ensure a good satellite signal, the antenna should be clear of obstructions and have a clear view of the sky. We recommend installing on the pushpit or similar location, not on the mast.

Once powered ON, your device will try to obtain a GPS signal. The time taken to obtain a signal will vary from a few minutes when the device has never been used or not been used for a while, to a few seconds when the device is regularly used.

Powering the Unit

The device is designed to attach to your yachts batteries 100% of the time, via the cable. However, it does have an internal rechargeable battery which is used should the unit lose power.

The YB3i comes wired with 2.9 meters of cable from the factory. You may need to extend this to get it to your boats distribution board. You should extend it with the same gauge cable and type. Each wire core (Positive and Negative) should have 2 layers of insulation like the cable it comes with. Simply wire the positive and negative cores of the cable into a spare circuit in your distribution board. The unit will run on any DC voltage between 9v and 32v. On average the unit will draw about 350 milliamps under normal operation.

This new feed should be fitted with a 2A fuse near the power source to protect the cable in the case of a short circuit of the cable. Wiring should be carried out as per the following:

Standard 2-Wire

Brown (or Red): Live (9-32v DC)
White (or Black): Neutral (0v DC)

Activation and operation

To activate the YB3i, please go to the PredictWind Satellite Portal.

When powered on the device will automatically send GPS position reports.

There is an LED indicator on the bottom of the unit. Please note the LED is not bright, you may need to cover with your hand to see the flash. The LED has the following indicator modes:

  • Intermittent green flash – running on external power
  • Intermittent red flash – running on battery
  • Red/Green alternating – booting up or updating firmware
  • Off – in shipping mode, stealth mode, or the battery has run out and there is no external power

Device Maintenance

Replacing the Battery

Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. The device battery is not user replaceable; it can only be replaced by your device service provider.

Having said this, the battery in the device should maintain its ability to charge to at least 90% of capacity through 1000 charge cycles. This means that if you charged the unit every day (unlikely) the battery would need to be replaced every 3 years. If you charged the device once a week, it would need the battery replacing once every 10 years. However, you do not need to worry about this issue if you have the unit connected to the yacht’s batteries 100% of the time. With a power draw of only 350 milliamps, your house batteries will only go flat if left unattended for a very long time.


To clean your device use a soft slightly damp cloth to clean any dirt. Do not use alcohol or abrasive substances to clean your device.

Fault Finding and Support


If something isn’t working correctly, you should first ensure the unit is powered, and any connections in the circuit are good. You can also do a hardware reset on the device by swiping the reset magnet all the way around the outside edge of the unit. The unit will beep after about 10 seconds, and will then be reset.

If neither of the above work, then please get in touch with the help desk, using the details below.

Helpdesk and Support Details

For assistance, please contact the PredictWind support team – it would greatly help us if you provided the following information:

Name and contact number
The serial number of the Device (see serial number label)
Symptoms of the fault
History of action taken to attempt to rectify the fault

Please remember that the more information you can give us, the better we’ll be able to help you.