Tank update messages store the pressure readings of the wireless tank pressure transmitters during a dive.
Moment the message refers to, in UTC. FIT stores it as seconds since the FIT epoch (December 31, 1989, 00:00:00 UTC); decoders usually expose it as a regular date.
sensorEnumIdentifier of the tank pressure transmitter.
antExtendedDeviceNumberUpperNibbleantTransmissionTypeLowerNibbleantDeviceTypeantDeviceNumberPressure of the tank.
mesgNumStringGlobal message number identifying the kind of message. Decoders use it to know which profile to apply to the data.