2. Weather conditions should be anticipated to provide marshalling in visual
conditions if practical.
3. Aircraft should not be required to climb or descend into the overcast (IMC) to
comply with altitude limits if control can be safely exercised above or below the
overcast.
4. Aircraft should retain formation when possible.
Formation flights are authorized a maximum of four aircraft in VMC or two
aircraft in IMC.
Vertical Separation in Marshal
Table 11-27 shows how vertical separation should be used for aircraft in marshal.
Type Aircraft
Vertical Separation
Helicopters
500 feet
Fixed wing
1,000 feet
Table 11-27 -- Vertical separation in marshal
Approach Instruction
AATCC will issue the following information to each aircraft prior to approach clearance:
EAT
Final control frequency
Type approach (Additionally for Helicopters - outbound bearing for LH-5 only)
Other pertinent information
11-68