The pipe stands shown on floors six and seven of the Nahant Site 131-1A tower probably held azimuth scopes, which were less complex telescopes that determined bearings to a target but not its range from the tower.
The observation posts displayed on floors six and seven of the Nahant Site 131-1A tower probably housed azimuth scopes, which were less intricate telescopes that determined directions to a target but not its distance from the tower.