Three star type objects traveling in a triangular formation over Washington State

I observed three star type objects travelling in triangular formation (one lead object, followed by two objects travelling roughly side-by-side.)  The objects were going from south/south west to north/north east.  They appeared to be at a high altitude (like a satelite).  Their path did not deviate.  They did not make a sound.  I have been observing satelites for years and have never observed two or three flying together.
We wonder whether the witness might have observed an overflight of what are thought to be U. S. Navy "NOSS" surveillance satellites, which fly in formation.  PD