Japanese losses were modest. The British assessed that two Japanese aircraft had been destroyed and another three damaged during attacks on airfields at Truk. Damage was also believed to have been inflicted on the airfields, floating dry dock, oil tanks, other harbour installations and ships that were attacked. Following the operation, Brind judged that rockets had proven more useful than bombs, and was critical of the gunnery of all the cruisers other than "Newfoundland". Members of the Japanese garrison told US Strategic Bombing Survey investigators after the war that the British raid had resulted in almost no damage. The most significant loss was the destruction of part of the garrison's records, which led to a decision to bury the remaining files. Historian David Hobbs has judged that Operation Inmate "provided realistic and useful training for ships that were newly arrived in the Pacific and everyone, including "Swiftsure"s embarrassed gunners, ... learned something". Peter C. Smith has also noted that while few targets were located, the raids provided useful experience for "Implacable"s air crew and "the standards of flight launch and recovery attained during the operation were to stand them in good stead in the months ahead". Similarly, British official historian Stephen Roskill concluded that Operation Inmate achieved its goals.