The fire control system adopted by the Royal Navy in the late 1900s and early 1910s, the Dreyer system, allowed for firing by ships steaming in a straight line against an enemy ship at short to medium ranges.
But the alternative system offered by Pollen would have allowed longer ranged accurate fire, as well as fire by ships manoeuvering at speed (as it incorporated variable motion of own-ship-course).
What would have happened had this been adopted - assuming of course that WW1 goes mostly as OTL, the two major potential PoDs are the Dardanelles operation (where ships with the Pollen system would have been better able to attack the Dardanelles fortifications despite evasive manoeuvres) and Jutland.
So - what could the results be?