Aeronautical Information Manual (AIM), page 574

Index   573 -- Page 574 -- 575

TBL 10-1-1
Helicopter Use of Standard Instrument Approach Procedures

Procedure Helicopter Visibility Helicopter MDA/DA Maximum Speed Limitations
Conventional The greater of: one half As published for The helicopter may initiate the final
(non-Copter) the Category A visibility Category A approach segment at speeds up to
minima, 1/4 statute mile the upper limit of the highest
visibility, or 1200 RVR

Copter Procedure As published As

GPS Copter Procedure As published As

Several factors effect the ability of the pilot to acquire and
maintain the visual references specified in 14 CFR
Section 91.175(c), even in cases where the flight visibility
may be at the minimum derived by TBL 10-1-1. These
factors include, but are not limited to:
1. Cockpit cutoff angle (the angle at which the cockpit or
other airframe structure limits downward visibility below
the horizon).

Approach Category authorized by
the procedure, but must be slowed
to no more than 90 KIAS at the
MAP in order to apply the visibility
published 90 KIAS when on a published
published 90 KIAS when on a published route
or track, EXCEPT 70 KIAS when
on the final approach or missed
approach segment and, if annotated,
in holding. Military procedures are
limited to 90 KIAS for all segments.

2. Combinations of high MDA/DH and low visibility
minimum, such as a conventional nonprecision approach
with a reduced helicopter visibility minima (per 14 CFR
Section 97.3).
3. Type, configuration, and intensity of approach and
runway lighting systems.
4. Type of obscuring phenomenon and/or windshield

10-1-4 Helicopter IFR Operations

Page 574 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   573 -- Page 574 -- 575