The Maritime Monitoring and Messaging Microsatellite (M3MSat) is a tele-detection satellite developed by the Canadian Space Agency and launched in 2016.

Its mission is to demonstrate and test the technology to assess the utility of having in space an Automatic Identification System (AIS) for reading signals from vessels to better manage marine transport in Canadian waters.

[2] The system will be supported by an instrument called a Low Data Rate Service (LDRS), which transmits AIS messages to ground sensors.

This data will be sent to ground stations to then be relayed to operators for Defence Research and Development Canada (DRDC).

[2] This will make it possible to identify and record marine traffic, know vessels' direction, cruising speed, and ensure that they navigate legally and safely in Canadian waters.