About RockFLEET / YB3i

The RockFLEET is a truly global tracking and messaging device designed for permanent installation on ships, yachts, vehicles and other assets. The device is waterproof and ruggedised, with a variety of mounting options to suit your needs. It's a cost-effective and global method of tracking and communicating with your assets wherever they may be.

RockFLEET Tracking and IoT device by Ground Control

The RockFLEET Device

RockFLEET has an optional built-in Iridium and optional GSM capability, allowing the use of terrestrial mobile phone networks when possible, automatically switching to the global Iridium satellite network when GSM is not available.


The RockFLEET has optional GPRS connectivity

RockFLEET has a comprehensive set of tracking, messaging and M2M/IoT features, all configurable from your tablet or smartphone via the RockCONNECT app.

Your RockFLEETs positions are visualised on our easy-to-use web-based management system, called the Core.


The RockFLEET features:

  • Autonomous GPS tracking
  • Truly global 2-way communication system from anywhere on Earth
  • Various mounting options for covert or non-covert installation
  • Transmission via Iridium Satellite and GSM (via optional add-on)
  • Integrated Power Conditioning (8-32V)
  • Internal Battery Backup allows for up to 5 months of unpowered operation
  • Over-the-air reconfiguration of key parameters such as tracking frequency
  • Optional serial integration add-on to provide sat-comms to other devices

How does the RockFLEET work?


The RockFLEET Network

RockFLEET can be mains or battery-powered, obtaining a position using the GPS satellite network, and transmitting it back to Rock Seven HQ using either GSM or the Iridium satellite network.

At the heart of RockFLEET is an Iridium 9603 modem. The RockFLEET hosts the 9603 and provides it with an antenna, and its power supply requirements. Various options are provided for allowing you to communicate with your own systems, via RS-232, Bluetooth LE and more.


9602 version (pre March 2020):

Older versions of the RockFLEET (sold before March 2020) contained an Iridium 9602 modem.
The functionality of both devices is the same.

About Iridium

Iridium is the only satellite network that allows transmission of information from any point on Earth – other networks have no coverage in the polar regions, and have intermittent or no coverage in other marine and land areas.

Iridium has 66 satellites in orbit around the Earth, allowing coverage anywhere on Earth 24 hours a day, 7 days a week. No other satellite network has truly global coverage. Messages sent via Iridium take just seconds to reach you, via e-mail or directly to your web service.