Enroute Alternate Weather Requirements

[Henry VIII]

Sorry guys, I guess it’s time to refer to rules regardless of each single company ops manual.

EU-OPS 1.297 (C) says :

[(c) Planning minima for a:

(1) Destination alternate aerodrome,
(2) Isolated aerodrome,
(3) 3% ERA Aerodrome,
(4) En-route alternate aerodrome
required at the planning stage
An operator shall only select an aerodrome for
one of those purposes when the appropriate weather
reports or forecasts, or any combination thereof,
indicate that, during a period commencing one hour
before and ending one hour after the estimated time
of arrival at the aerodrome, the weather conditions
will be at or above the planning minima in Table 1
below.]

Table 1 Planning minima – [Destination
alternate aerodrome, isolated destination
aerodrome, 3% ERA and en-route alternate
aerodrome]
Type of approach------------Planning Minima
Cat II and III-------------------Cat I (Note 1)
Cat I-----------------------------Non-precision (Notes 1 & 2)
Non-precision----------------Non-precision (Notes 1 & 2)
------------------------------------plus 200 ft/1 000 m
Circling-------------------------Circling

Note 1 RVR.
Note 2 The ceiling must be at or above the MDH.


EU-OPS 1.297 (D) details the ETOPS en-route planning minimas.

Regards