Aye, there is also a significant difference between hiding a many thousand ton, hundreds of meters long ship on the high seas, and a 1 meter tall human being in the forest.
That is a very small soldier.
Sgt. Threefoot, reporting for duty!
Ha! you're right. Maybe.. 1.7 meters?
It's not about hiding it, it's about making it hard to accurately observer its heading and therefore hard to hit with a torpedo.