The Naval Long Service and Good Conduct Medal (1848) is a long service medal awarded to regular members of His Majesty's Naval Service. It was instituted by Queen Victoria to replace the Naval Long Service and Good Conduct Medal (1830), and could be awarded to other ranks and men serving in the Royal Navy and Royal Marines. Since 2016, after a number of changes in eligibility, all regular members of the Royal Navy and Royal Marines (ratings, marines and officers) who have completed fifteen years of reckonable service can be awarded the medal.