provide an excellent referetice for a landing 
technique. The use of the angle of attack 
indicator will provide the airplane with the 
proper airspeed while the mirror system refer- 
ence will provide the desired flight path.: When 
shipboard operations are conducted without 
the mirror system and angle of attack indicator, 
the landing signal officer must provide the 
immediate reference of airspeed and flight path. 
The LSO must perceive gnd judge the angle of 
358