I have a question on the significance of speed bugs. PLease excuse me if this has been addressed in the past.I have done a search on this topic but, as yet, I have been unable to find the answer so, if anyone can help, I would appreciate it.Using a particular flight plan as an example in which the settings from the FMC are, as follows.V1 = 112VR = 118V2 = 129I notice when I click the hidden mouse area on the airspeed indicator, while on the ground, the speed bugs set, as follows.1st bug = 112 (V1 on the FMC)airspeed command bug = V2 (as on FMC)The other 4 bugs set to, what looks like increments of 20 for each one based on V2. So the 6th bug is equal to V2 + 80, approximately?Could someone please tell me what the significance of the speeds which the last 4 speed bugs are set to?Also, the reason I said "approximately" is because the 2nd bug, 145 in this case, is V2 + 17, not 20,(the others seem to follow in increments of 20 from this one) in the particular flight plan I am using.Thank you, in advance, for any constructive helpNorm

NormThe speedbugs in PIC are set as: v1, v2, Vref+20, Vref+40, Vref+60, Vref+80.The Vref is the landing flap30 reference speed. Those bugs are used primarily to aid flap retraction in the climbout and flap extending when slowing down for landing.Read this page carefully, and you'll understand more:http://www.757.org.uk/767/sops/sop1.htmlTero

Thank you so much Tero.The link you gave me, not only answered my questions, but is very informative and interesting also.I greatly appreciate the response.Thanks againNorm