Hi @bmartel,
I’ve moved your comment to its own post, because the other post was Navigator-specific 
The Pixhawk has an internal MS5611-based barometer that measures the air pressure, which is the one shown on your screen (connected via SPI1). The external MS5611 barometer from a Bar30 should show up as MS5611 (I2C1):
It should also show up as a non-zero BARO2_DEVID and BARO2_GND_PRESS.
In your case that’s not being displayed, so your Bar30 is not being detected. I’d recommend double checking the cable, making sure the connector is fully plugged in and that none of the wires are loose. If that doesn’t help your sensor (or Pixhawk I2C port) is damaged or faulty, so you should contact support@bluerobotics.com to discuss (include a link to this discussion, and your order number (or a rough order date) if possible).