Boeing Airspeed Bugs Bug me too (love the pun geddit)
Various B737 Series FCTM recommend that two white bugs be set together on the ASI to indicate Vref. When these white moveable markers are squeezed together they seem to cover several knots rather than as desired a specific airspeed. Exactly what is the advantage of setting two white bugs at Vref instead of one? Is it because a spare bug should be placed somewhere rather than be shoved up well out of the way?
Why not have one white bug set on Vref just like other white moveable bugs are set at V1, VR, V2+15 and clean maneuver speed (210, 220 or 230 knots)