Able Seaman Ryan Samuel Donovan was ordered to serve at least 25 years and 194 days at Winchester Crown Court for the murder of Lieutenant Commander Ian Molyneux while HMS Astute was docked in Southampton on April 8.
Donovan, 23, admitted murdering the father-of-four with an SA80 rifle while HMS Astute was docked.
Appearing at Winchester Crown Court today, he also admitted the attempted murders of Petty Officer Christopher Brown, 36, Chief Petty Officer David McCoy, 37, and Lieutenant Commander Christopher Hodge, 45, during a goodwill visit to Southampton.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here