This field research studies human-human interactions (HHI), seen from cockpit?s perspective in context of Collaborative Decision Making (CDM) during flight operation situations. It is based on the assumption that cooperation among all participating operators achieves positive effect on CDM operation. The aim of the research is to identify, how factors driving cooperative behaviour are established in flight operation situations during day-to-day HHI at action level. Obtained results are used to guide future CDM design with simulation software development and system behaviour simulation. In this paper, a cockpit survey is introduced which examines two highly dynamic flight operation situations. Both situations are usually time constrained, change quickly and require synchronous human-human cooperation between pilots and multiple other operators. The first one, turn-round operation, involves HHI with information sharing via face-to-face or technological means and HHI with task/decision making distribution between pilots and other operators. The second one, the flight operation itself, involves HHI with information sharing only via technological means and HHI with task/decision making distribution between pilots and other operators.