Chrono shot data messages store the speed of each projectile measured by a ballistic chronograph.
timestampDateTimeMoment 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.
Speed of the projectile.
shotNumUint16Number of the shot in the session.
mesgNumStringGlobal message number identifying the kind of message. Decoders use it to know which profile to apply to the data.