In 1960 he was promoted to surgeon lieutenant-commander,[REF] and the following year he was sent to the United Kingdom to study oral surgery,[REF] gaining a Higher Dental Diploma from the Royal College of Physicians and Surgeons of Glasgow [REF].
In the 1965 New Year Honours Logan was appointed a Member of the Order of the British Empire,[REF] and the following year he was promoted to the rank of surgeon commander [REF].