Some soft engine noise slow moving @75 feet up from the bay headed east northeast inland.

Three lights triangular positions. One flashing light, all lights were white. Soft engine noise. Slow moving. Tilted some as it turned more northerly. Low flying slow moving. Could be a drone but it was quite large maybe 20 feet across. Craft not visible in the dark but lights were fixed in triangular shape as it passed almost silently over Main street as I was looking toward the bay it was in front of me then it was to my left as it disappeared over the trees