alternatehistory.com

The British Chevaline was an 'upgrade' of Britain's Polaris missiles in light of the Soviet ABM deployment. This resulted in the missiles having less range (inside the GIUK Gap), 2 instead of 3 warheads, (greater yield) but greater chance of penetrating the ABM shield.



WI one of the other options was pursued? According to Wiki they were:


  • The Royal Navy preferred to upgrade to the Poseidon missile
  • The US also favoured the Poseidon
  • "Option M" which used a simple "de-MIRVed" bus
  • "Hybrid" (or "Stag") which put the newer Poseidon warheads on the existing Polaris A3T missiles
  • "Mini Poseidon", a similar adaptation with a smaller six-Poseidon-warhead payload on the A3T
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