Relative horizontal speed of ISIIS instrument through the water, from Valeport Model 803 ROV Current Meter mounted on ISIIS-3. Quality flag is 'Horizontal_Speed_flag,' see column description for more information about what data are flagged
Average horizontal net velocity, reported as meters per minute, used in MOCNESS system.
Average is the mean of all observations, not just the mean of the global minimum and maximum.