Naval crew skills not functional in spotting torpedoes?

It would appear that the range for detection of torpedoes, in naval battles, is somewhat broken. From the attached screenshots:

  1. Naval-Air detect - the ship crew can see targets at 10km

  2. Naval-Surface detect - this same crew has the skills to see objects at 1.5km, and even hidden ones at 50m

  3. Naval-Torpedo detect - yet can only see a torp at 10m?

It would appear to be a error in the numbers added as base detection range, and also the values used as multipliers for skill levels.