There was a video going around the Facebook aviation sites a while ago which explained the ‘defined minimum manoeuvring speed’ very nicely. The suggestion of having a sticker on the ASI with it clearly shown was a good one, especially for those of us who don’t fly the same aircraft type every time. For those who do, it is still a good reminder to be vigilant. Whether or not it would have helped in avoiding this crash I don’t know; can only speculate that it would have.