Table 2. Overview of the forms of interaction. Episodes of collective activity Forms of interaction between the crew members, the boat and the environment Episode 13 form 1: Individual coordination with the boat of the two crew members to maintain flight stability Episode 3,9 form 2: Verbal communications between crew members to share expectations about perturbations of the flight stability Episodes 2,7 form 3: Interpersonal coordination to optimize respective actions directed to the boat to maintain flight stability Episodes 8,10,11 form 4: Interpersonal coordination to find solutions in reaction to the perceived flight instability Episodes 1,4, 5,12,14 form 5: Individual actions of each crew member to a critical flight perturbation to recover control of the boat Episode 6 form 6: Verbal communications to build common explanations of the boat’s flight perturbation occurred in the near past