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AIM CHG 2
(Procedures for Air Navigation Services – Air Traffic
Management (PANS-ATM)) contains important
guidance for pilot training programs. Chapter 15
includes Special Procedures for In-flight Contingen-
cies in Oceanic Airspace, as well as Weather
Deviation Procedures. Chapter 15 covers in-flight
diversion and turn-back scenarios, loss of navigation
capability, and procedures to follow for weather
avoidance. This critical guidance is reprinted in the
Oceanic Operations section of the U.S. Aeronautical
Information Publication (AIP), the International
section of the Notices to Airmen Publication, and
FAA Advisory Circular 91-70, Oceanic and Remote
Continental Airspace Operations.
c. Strategic Lateral Offset Procedures (SLOP).
Pilots should use SLOP procedures in the course of
regular oceanic operations. Guidance regarding
SLOP, including how to perform the procedures, is
provided in the Oceanic Operations section of the
d. Pilot Report of Non-RNP 10 Status. The pilot
must report the lack of RNP 10 or RNP 4 status in
accordance with the following:
1. When the operator/aircraft is not authorized
RNP 10 or RNP 4 - see paragraph 4-7-4.
2. If approval status is requested by the
controller - see paragraph 4-7-8 e.
e. Pilot Statement of RNP 10 or RNP 4
Approval Status, If Requested. If requested by the
controller, the pilot must communicate approval
status using the following phraseology:
(Call sign) confirm RNP 10 or 4 approved
"Affirm RNP 10 approved" or "Affirm RNP 4
approved," as appropriate, or
"Negative RNP 10" (See paragraph 4-7-4 for
Non-RNP 10 aircraft procedures.)
f. Pilot action when navigation system mal-
functions. In addition to the actions addressed in the
Oceanic Operations section of the U.S. AIP, when
pilots suspect a navigation system malfunction, the
following actions should be taken:
1. Immediately inform ATC of navigation
system malfunction or failure.
2. Accounting for wind drift, fly magnetic
compass heading to maintain track.
3. Request radar vectors from ATC, when
4-7-4 Operational Policy/Procedures for the Gulf of Mexico 50 NM Lateral Separation Initiative