|Click to enlarge|
It shows the effects of detonating a one megaton nuclear bomb on the Faslane Naval Base in Gare Loch.
The base serves as home to Britain's nuclear deterrent, the fleet of Vanguard-class nuclear-powered and nuclear-armed submarines, as well as conventionally armed nuclear-powered submarines.
The purpose of attacking Gare Loch would be to destroy any of Britain's Vanguard-class submarines which were still in port but might be capable of firing their Trident missiles.
The map also shows the effect of detonating two more one megaton bombs in the waters south of Gare Loch. An enemy might do that to try and catch submarines attempting to run for open water.Fallout from water bursts is particularly dangerous.
The fallout pattern assumes that the wind would be from the south west [as it usually is].