This is the Royal Navy service record for R E Jones, courtesy of his daughter, Rae.
He signed up for 12 years on 8th December 1923. That fits with him starting work in the Hong Kong prison service in 1935.
Rae knew he served on submarines. I think that is shown in the bottom set of entries that show him serving on Cyclops. According to http://www.battleships-cruisers.co.uk/hms_cyclops.htm, HMS Cyclops was a submarine depot ship, operating in the Mediterranean between the world wars.
Jones' service records for Cyclops show an extra identifier in brackets, eg "(L16)". The "L" followed by a number should be the submarine he was working on, eg HMS L16: http://en.wikipedia.org/wiki/HMS_L16. I'm not sure what the "(SC)" means.
The last entries on this page are for 1929, so it seems there should be another sheet for the entries up to 1935.
Rae believes he first visited Hong Kong during his time with the Royal Navy, but I guess that visit was recorded on the later years.