StoneRoad2013's photos with the keyword: ROC

This shows the "average" protection factor in various types of undamaged buildings - which is derived by working out distance from source [eg settled fallout] plus material type[s] and thickness[es]. . not my image : fair use & public education

The half-life curve - plotting from the time of the detonation NOT the time of fallout deposition, as this may continue for some time. [However, the normal half-life decay curve applies to the fallout once accumulation / deposition has concluded - assuming weather or other local conditions do not "stir things around" . . not my image : fair use & public education

The relative risk to the human body from exposure to alpha, beta and gamma radiation, as emitted by fallout [ignoring the intense burst of electro-magnetic radiation from the actual detonation]. Alpha particles are relatively low power, even skin [unbroken] is an effective barrier, as are a very few inches of air. Beta particles are more energetic but are stopped by a thin layer of metal ... Gamma radiation is very energetic, requiring lead or greater thicknesses of other materials for protection. [cf X-rays] However, all three are capable of much more serious damage to the human body if ingested [and that includes deposition in the lungs from breathing in contamination] . not my image : fair use & public education

Back in the late 1980s/1990ish, the upper echelons of the Royal Observer Corps were considering implementing a new NCO rank. [the four stripe "Master Observer" m/obs ie OR-9 ]. This would be to act as an assistant to the Group Commandant in matters such logistics and running the power, ventilation etc in the building. I was given to understand that I was in the running for this promotion - especially after I passed a summer school course with an almost perfect score on the final test. Unfortunately, the ROC stand down in 1991 prevented this ...

A potted biography of the service by Obs. Cdr. Ken Whitfield, M.B.E. in the Royal Observer Corps. Apologies for the poor quality.

Group Commandant K Whitfield, MBE ... 23 Group {Durham} Royal Observer Corps. Ken was a great character, and always good to work for [or with].

Display of items and information about the Royal Observer Corps and Observer Commander Ken Whitfield, M.B.E., the Group Commandant of 23 Group ROC. Seeing this caught me by surprise; I knew KW, as I was a volunteer member [and NCO] at the Group Control in Durham. en.wikipedia.org/wiki/Royal_Observer_Corps

The remains of the 27 Group ROC Control at North Connel, near Oban. www.subbrit.org.uk/sites/oban-roc-group-hq

The remains of the 27 Group ROC Control at North Connel, near Oban. www.subbrit.org.uk/sites/oban-roc-group-hq