Two the flight scenarios contained no unexpected procedures or

Topic: World
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Last updated: December 17, 2019

 Two scenarios were developed using the flightsimulator application. The participants were instructed to fly B-52 simulated aircraftfor 3hours using instrument flight rules (IFR).

One Scenario was amulti-segment flight in which participant flew segments 1(Ada Mun to Plain Regal Airport), 2 (Plain Regal to Aberdeen Mum),3 (Aberdeen Mum to Wishkah River Ranch Airport, WA). The second scenario was asingle-segment flight mission in which pilots flew from Ada Mun Airport, OK to WishkahRiver Ranch Airport, WA. The administrations of the scenarios were counterbalanced. In addition, to prevent confounding effects, we requested the pilotsto first perform one scenario, and then come back next day to perform thesecond scenario. The pilots were told that the simulator flights would be flownlike real flight. Although the flight scenarios contained no unexpectedprocedures or emergencies, the pilots were instructed to be ready to respond toany emergencies that might occur, just like in the real world.

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In themulti-segment day, the pilots flew a total of three segments. In thesingle-segment day, there were simulator off-motion opportunities to allowpilots to go to “the back of the plane.” Cued by ATC at the Scheduled time,they began taxiing and took off. While en route, they made typical use of theautopilot.

Airspace-specific ATC background chatter (recorded prior to thestudy) was played back over the pilots’ headsets or overhead speakers to add tothe realism of the flight. At the end of the flight segment, the pilotsconducted a routine descent and landed the airplane, again interacting withATC, and taxied from the runway to a designated gate. All flights wereconducted in accordance with FAA instrument flight rules (IFR). Both pilotspracticed a 10-minute Psychomotor Vigilance Test (PVT). They also practicedfilling out the Samn-Perelli (SP) Subjective Fatigue Check card and theKarolinska Sleepiness Scale (KSS) subjective sleepiness questionnaire. In addition,the pilots started a paper-and-pencil sleep/wake/duty log and recorded their Scenarioover the past two days. They began wearing an Actiwatch-2 wrist activitymonitor (Mini-Mitter Company, Inc.) to measure estimated sleep times during thestudy (see Figure 4).

 The pilots keptthe log and wore the wrist activity monitor through to the end of the third dayof the pairing.

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