According to the Iliad, Helen had the beauty to launch a thousand ships.
The beauty necessary to launch one ship, therefore, can be expressed as a millihelen.
If we now assume that a negative millihelen is the ugliness needed to sink a ship, we can come to the following conclusions:
1: Submarines control their depth by manipulating the number of millihelens they experience. 2: This makes the Helen a unit of bouyancy. 3: Sirens produce negative millihelens, as they have a habit of sinking ships rather than launching them.














