[header] How to join the navy [title] Be in the right age range. [step] To enlist in the navy, you must be at least 17 but under 34 years of age. If you're 17 years old, you will need your parents permission to enlist, otherwise you can wait until you turn 18 to self apply. 
To become an officer, you must be at least 19 and no older than 35. [substeps] The age requirements vary according to specific positions; for example, some officer positions may require that you be older than 19 to apply.