UFO Above Puget Sound, Seattle, WA (7:45 pm) - February 1, 2023

I was on SEA-Bainbridge ferry 1/2 way across Puget Sound. Looked to my right (south facing) to determine ferry's location en route. I observed 3 lights in night sky, 50 degrees above horizon, southern sky. 3 lights in triangle' formation, stationary; then formation began to rotate, slowly westwardly, with highest position light increasing its position higher into the sky. As object continued to rotate, 2 more immediately adjacent lights appeared, moving with the object.  The position/spacing of the 3 lights indicate the object was massive in size. (The lights were too large for the object to be a satellite.)