From Tony Vine
It seems that every week I am writing an Obit for the Submarines Association. Sadly today it is for a fellow Mobi.
Apparently Biff passed a month or so ago and the local RSL failed to notify the SAA.
VALE - CPOMTP3SM JOHN MILLS R42858 - MOBI - JANUARY 1964 INTAKE
It is with great sadness that the SAA advises of the death of long time SAA member John “Biff the Tiff” Mills in Adelaide.
John was born in Cheshire England in March 1947 and emigrated to Australia at the age of two where his family settled in South Australia. He enlisted in the RAN in the January 1964 intake of naval apprentices at HMAS NIRIMBA. In June 1964 he was rated as an Engine Room Artificer Apprentice (Fitter and Turner).
John, like many apprentices, before and after him, would fall foul of the Master at Arms resulting in him being placed on “2nd Class for Conduct” in 1966. Despite this setback he graduated from NIRIMBA in July 1967 completing his training on the Destroyer Escort HMAS YARRA. He was advanced in minimum time to ERA 3rd Class (Leading Seaman) in January 1968 and to ERA 2nd Class (Petty Officer) in January 1969.
In 1969, John volunteered for submarines and after passing the suitability test, he undertook submarine training at HMAS DOLPHIN in the UK. It is known that he served on HMAS ONSLOW, OTWAY and OTAMA. A keen punter, he has been remembered for his running of an illegal Starting Price (SP) Bookmaking service at HMAS PLATYPUS. John discharged from the RAN around 1980 and later moved back to South Australia.
John was a long-time member of the SAA SA Branch. The SAA National Executive extends its condolences and sympathy to John’s family and friends.
Vale John Mills.
I only vaguely remember John as he was 3 terms behind me, and as it was back in the day, MOBIs tended to know every MOBI above them and progressively less and less of the terms following. 
rings a bell though..! 
so VALE, John Mills, rest on your oars, your journey's done... R.I.P. 