An ALAMO float begins an observation cycle at the surface, descends to a parking depth, remains there for a designated period of time, optionally descends deeper, ascends to the shallowest depth it can reach, remains there to transmit data and get a position fix if at the surface, and then begins the next cycle. Only ascent data are presented here.
Some helpful links:
About – Air Launched Autonomous Micro Observer (ALAMO)