Andy Pag puts Predictwind’s IridiumGO! through its paces on an Atlantic crossing to test how good the satellite modem really is

Product Overview


  • Good coverage from the antenna
  • Unit charges from 12v, 110v, 220v or 240v sockets


  • Email app is glitchy
  • Weather models wide of the mark


Predictwind Iridium GO! tested at sea – review

Predictwind’s IridiumGO! is aimed at meeting the need for basic emergency, weather forecasting, telephone and email connectivity offshore.

The headline cost seems reasonable at just £522 ($699), but add to that the VAT, spare sim cards at £7.50 each ($10), the cheapest Predictwind subscription, which works via satellite is £74/quarter (£$99), and airtime at £105/month ($140).

The unit charges from 12v, 110v, 220v or 240v sockets.

The test of Predictwind Iridium GO!

Set-up took about two hours on a good Wifi connection to activate the SIM and register accounts with GEOS International, an emergency service, and Iridium Mail, the email service.

I also changed the unit’s default Wifi password to stop the whole anchorage from logging on.

A menu on an Iridium GO!

Menus and logs are intuitive once you know how. Credit: Andy Pag

There’s a marine antenna kit which retails for an extra £224 ($300), but the internal antenna worked well enough from inside the boat on clear days.

Calls worked through the associated app with the expected slight delay of a sat call. 150 minutes are included with the airtime agreement.

SMS messages were free to send, but most people either couldn’t reply at all or got clobbered for a few quid with each text they sent.

Verdict on the Predictwind Iridium GO!

The email app is cumbersome and glitchy, deserving of its 2-star Google Play rating, but it can be made to work when you have the time of an ocean passage to fill.

Predictwind’s proprietary weather models, PWG and PWE, were wide of the mark on the crossing.

Downloading the forecast for the remaining four models over the whole route took a couple of hours, and beyond 5-7 days the modelling is based on seasonal weather predictions rather than real-time conditions.

Continues below…

I downloaded GFS and ECMWF models for wind, gusts, waves, and CAPE, once a day for route planning.

I don’t regret having spent the best part of £1,000 on the service because I’m hoping much of it will be recouped when we come to sell the unit.

My biggest regret is that I caught myself checking emails a little too compulsively throughout the passage.

Predictwind’s Iridium GO!, £522

Buy the Iridium GO! direct from Predictwind

Also on the market

Garmin inReach

Garmin InReach Mini

This is a stylish handheld satellite communicator that shares your tracking data and allows you to send and receive SMS messages at sea.

The included weather feature isn’t suitable for passage planning, but you could arrange for a friend on land to send you more useful forecasts.

InReach Mini: £300.
Monthly subscription: £15-65

Buy the InReach Mini direct from Garmin

Buy the InReah mini from West Marine



This satellite messaging tracker rivals the inReach for features and cost, fits in your pocket and works worldwide. It pairs with a phone making it intuitive to use. A weather service is planned for the future. It’s available in the UK both on the Zoleo website and through Amazon.

Zoleo: £149

Buy the Zoleo satellite two-way communicator direct from Zoleo via Amazon (UK)

Buy the Zoleo satellite two-way communicator from Amazon (US)

Buy the Zoleo satellite two-way communication from West Marine



Elon Musk’ ls low earth orbit satellite internet network delivers broadband speed internet. The coverage areas are constantly increasing as more satellites are being added to the constellation. The dish can be mounted on even a small boat. But recent announcements imply the price for offshore use will be $5,000 per month.

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