This type of Guardian battles air-borne, which can make this particular enemy difficult to defeat, as Link's offensive options are narrowed down. They fly around an assigned path, shining a spotlight on the ground below. If Link enters this spotlight, the Skywatcher will activate, and, as with other Guardians, will begin charging its laser beam. Design-wise, they resemble Guardian Turrets with propellers.
Like Beamos that have appeared in modern Zelda games including Skyward Sword, Link is able to defeat this creature by shooting its eye with the use of a Bow and Arrow. Ancient Arrows in particular are very powerful against these enemies, since one successful shot to the eye will take it down instantly. When defeated, they will fall to the ground and explode as with any other enemy.
Should Bomb Arrows be available, the player could focus on destroying its rotors, which will make it careen down once the three rotors are destroyed, hampering its mobility almost completely.
Other strategies that can be used to defeat Guardians include utilizing the Perfect Guard ability, where Link can deflect the Guardian's laser with his shield at the right moment to take down the enemy upon three successful deflects. Link should be wary though, since if he fails to Perfect Guard, the laser may still hit him and cause significant damage. However, the lasers deflected by the Perfect Guard may not always hit or do full damage, as opposed to other guardians, as Skywatchers are constantly swaying around. Sometimes, the laser will clip the Skywatcher and not do complete damage.