Thank you very much for the answers Andy
That skill coaching is the least understood topic, at least for me. Now:
1. Is that skill coaching also adjudicated at the beginning of turn just like that In-Contact status?
2. Does skill coaching apply
only from superior to subordinate or it could be from any other units?
3. What forms of benefit a unit would receive if it's under the influence of his own or other's skill coaching, like increased number of shots, etc?
4. How's the rarity of this skill coaching happening? Is it so rare and the effect so minimal that we shouldn't worry much about it?