| As a management level engineering officer planning for transitioning from the maneuvering watch posted when departing a US port to at sea manning on a vessel classed for a periodically unmanned engine room, in consultation with the ship's master, when would the transition take place? |
| A) When leaving the navigable waters of the US which is 3 nautical miles from the coast line. |
| B) When leaving the applicable emission control area which varies with the port area. |
| C) When leaving the US exclusive economic zone which is 200 miles from the coast line. |
| D) When leaving the US territorial limit which is 12 miles from the coast line. |
