Belgium's Princess Astrid (R) and Prince Lorenz (C) pose with their children (L-R) Maria Laura, Amadeo, Laetitia Maria and Joachim during a ceremony on the A960 Godetia command and logistical support ship at the naval base of Zeebrugge July 29, 2011. Prince Joachim received his certificate of navigation and watchkeeping officer. REUTERS/Mark Renders/Pool (BELGIUM - Tags: ENTERTAINMENT MILITARY ROYALS)