The names of the 16 and 17 year old boys who fought for their country during the Second World War are carved into memorials in Chatham and Portsmouth.
The biggest loss of boy sailors was when HMS Royal Oak was torpedoed shortly after the start of the war. 125 teenage boys died.
The other major loss of young life was aboard HMS Hood - when 71 died. Today sailors can still join the Navy at the age of 16, but under international law they can't go to war before they're 18.
But for many going to sea was a positive choice. They came from difficult family backgrounds and joining the Navy gave them a future.
Now a memorial is being made to recognise their sacrifice.