Assertion: enlistment | /r/HasProperty | part of a rotation
Facets:
Source sentences:
text: In navies, a tour of duty is a period of time spent performing operational duties at sea, including combat, performing patrol or fleet duties, or assigned to service in a foreign country; a tour of duty is part of a rotation, where the ship may spend a six-month tour of duty, then spend one month in home port for maintenance, then a period of time on exercises, then return to her tour of duty.[citation needed]