All New DB Mk9 battery rechargeable map magnifier out now
Q & A - - Why so many pages ? - Why are there 9 page increments for every Speed ?
Supposing you have meticulously set your Tripmeter to the organisers test distance and you reckon your Tripmeter is 100% correct.
Then on the first Regularity section which is run at 30 mph, you arrive at the first ITC (Intermediate Timing Point, which is at 6.50 Miles @ 30mph = 13m:00s) where you reckon you are exactly 'Spot On' time, then you find that you have been penalised 15 seconds early.
Something must be wrong ! - You need to run a little slower - Not all organisers get their measured sections 'Spot On'.
So to quickly rectify the problem, you check the adjacent pages of your 30 mph page and you find that by using page 29.40 mph, where it shows at 6.50 Miles = 13m:16s (13m:16s is the nearest to 13m:15s for 6.5 miles) - Therefore you downgrade each and every speed specified by the organisers by 2.00%.
Hey Presto - A quick fix solution - However you can only do this if you have the Don Barrow professional option of speed increments !