Navy officials have condemned the actions of a pilot who took to the skies and drew a gigantic phallus over a town in Washington.

The incident came to the attention of local media after Okanogan County residents sent in pictures, including one mother who said she was upset because she had to explain to their young child what the drawing represented.

In a statement Navy officials said: "The Navy holds its aircrew to the highest standards and we find this absolutely unacceptable, of zero training value and we are holding the crew accountable."

It is believed the pilot had flown in from a nearby airbase in Whidby Island near Seattle. Bystanders who witnessed the event said it took the him around five minutes to complete the crude drawing.

"After it made the circles at the bottom, I knew what it was and started laughing," local Ramon Duran said to the Spokesman-Review. "It was pretty funny to see that. You don't expect to see something like that."

"I thought it was pretty funny," another said. "A lot of people have been talking about it."

The Federal Aviation Authority said there was nothing they could do about the incident as it was not a safety violation. They claimed they "cannot police morality", in a statement to local TV station KREM2.