Lieutenant Commander Michael O'Connor of Greenock's T.S. Gold Rover unit, is already the proud holder of the Sea Cadet Medal, which is given for 'especially meritorious service'.
Now he is one of only two Sea Cadet officers in Scotland to receive a prestigious new 50-year service medal.
Michael, 73, retired as Greenock Sea Cadets' Commanding Officer 18 years ago and is now chairman of the unit's management committee and senior trustee.
He has been a member of the Sea Cadets since 1953, and in 1996 was presented with the MBE by The Queen in recognition of services to the movement.
Michael said: "The Sea Cadets have been an important part of my life.
"We currently have 28 in the unit and we are going around schools making presentations as part of a recruitment drive."
The current unit HQ was opened in September 1973 following a fundraising campaign under Michael's enthusiastic and devoted guidance.
Michael, who lives in Balloch Road, said he was 'delighted and honoured' to receive his latest recognition.
The former shipwright and Scott Lithgow safety officer said: "We hope to see many more youngsters joining the Cadets and benefiting from the experience."
Youngsters joining up learn about Naval discipline, sailing, engineering, electrical engineering, seamanship, navigation, first aid, canoeing and they also play football.
They meet at TS Gold Rover in Baker Street on a Monday and Friday from 6.30 to 8.30pm.
New recruits are asked to go along on those nights with their parents.
Juniors are aged 10 to 12 and seniors from 12 to 18.