Description:
The first
operator enters the room and eliminates the
immediate threat.
He has the option of going left or right,
normally moving along the path of least
resistance to one of two corners. When using a
doorway as the point of entry, the path of least
resistance is determined initially based on the
way the door opens; if the door opens inward he
plans to move away from the hinges. If the door
opens outward, he plans to move toward the
hinged side. Upon entering, the size of the
room, enemy situation, and furniture or other
obstacles that hinder or channel movement become
factors that influence the first operators
direction of movement.
The direction each man moves in should not be
preplanned unless the exact room layout is
known. Each man should go in a direction
opposite the man in front of him. Every team
member must know the sectors and duties of each
position.
As the first operator goes through the entry
point, he can usually see into the far corner of
the room. He eliminates any immediate threat and
continues to move along the wall if possible to
the first corner, then he move along the
connecting wall to the second corner where he
assumes a position of domination facing into the
room.
The second operator, entering almost
simultaneously with the first, moves in the
opposite direction, following the wall and
staying out of the center. The second man must
clear the entry point, clear the immediate
threat area, clear his corner, and move to a
dominating position on his side of the
room.
The
third operator simply goes opposite of the
second man inside the room at least one meter
from the entry point and moves to a position
that dominates his sector.
The fourth operator moves opposite of the third
man and moves to a position that dominates his
sector.

Pros:
- The team clears most of the room while
entering.
Cons:
- The operators can be exposed for crossfire
from each others weapons.
- Movement around the wall can be difficult
depending of the possession of furniture in the
room.
- Nr. 1 might have to move past doors that
cannot be covert efficient by the other team
members.
- It might be difficult to help nr. 1 if he has
a stoppage ore is shoot in the other end of the
room.